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A powerful numerical method for the calculation of the magnetic-flux and current-density distributions, magnetic moment, and flux creep in typeII superconducting strips and slabs in a perpendicular applied magnetic field has been developed and demonstrated by E. H. Brandt (MPIStuttgart). The method is valid for samples of arbitrary thickness, including as limits the perpendicular geometry (long thin strips and circular disks in a perpendicular field) and the parallel geometry (long slabs and cylinders in a parallel field). The method applies to arbitrary cross section and arbitrary current-voltage characteristics E(J) of conductors and superconductors, assuming a linear equilibrium magnetization curve B = mu_0H and isotropy.
The method circumvents the costly computation of the magnetic field in the infinite space outside the sample and its inaccurate spatial differentiation. Instead, the current density J(x,y,t) inside the sample is obtained directly by time integration of a 2D integral equation of motion, without requiring any differentiation. Once J(x,y,t) inside the sample is known, B(x,y,t) can be calculated throughout all space using the Biot-Savart law.
The author presents detailed results for rectangular cross sections (2a x 2b) assuming a power-law relation between the local electric field E and current density J of the form E = E_c(J/J_c)^n, which includes the ohmic (n=1) and Bean (n --> infinity) limits. In the Bean limit above some applied field value, the lens-shaped flux- and current-free core disconnects from the surface, in contrast to previous estimates based on the thin-strip solution. The author presents results for the ideal diamagnetic moment, saturation moment, field of full penetration, and complete magnetization curves for all aspect ratios, 0 < b/a < infinity.
A related preprint by E. H. Brandt presents the solution of the nonlinear and nonlocal diffusion equation for the relaxing current density J(x,y,t) in long superconductors of arbitrary cross section in a constant perpendicular magnetic field B_a. For the relation E = E_c(J/J_c)^n, an exact solution for the electric field, E(x,y,t) = f(x,y)g(t), is obtained by the method of separation of variables. The electric-field profile f(x,y) depends weakly on n and becomes universal for n > 5. At large times, E proportional to 1/t^[n/(n-1)] and J proportional to 1/t^[1/(n-1)] for n > 1, while E proportional to J proportional to exp(-t/tau_0) for n = 1.
Vortices
According to S. Ryu (Ohio State) et al., above a critical magnetic field, the vortex lattice in a model layered high-temperature superconductor becomes unstable to plastic deformation via penetration of pairs of point-like disclination defects. The instability is characterized by the competition between the elastic and the pinning energies, and is assisted by a field-induced softening of the lattice associated with a dimensional crossover of the fluctuations. The authors find through computer simulations that this leads to a phase transition from crystalline order at low fields to a topologically disordered phase at higher fields. This mechanism is proposed as a model of the low-temperature field-driven disordering transition observed in neutron-diffraction experiments on Bi2Sr2CaCu2O8+d single crystals.
An exact solution for the helical vortex structure in a type-II superconducting strip subjected to a magnetic field parallel to a transport current has been obtained by Yu. A. Genenko (Donetsk and Goettingen). The calculated field-dependent critical current at which the vortex becomes unstable to helical distortions is found to be comparable with experimental values of the critical current for dissipation onset in thin films. A resistive picture following from these results includes a regime of magnetic-moment and voltage oscillations that are controlled by the current, field, and sample dimensions.
A dynamic theory of helical vortices in a superconducting wire subjected to a longitudinal bias current and an axial magnetic field has been developed by M. Shvartser et al. (Bar-Ilan). The authors obtain the helix radius and the helix-motion-induced voltage as functions of time.
A preprint by M. W. Coffey (Regis) reports a theoretical investigation of the nonlinear dynamics of vortices in ultraclean type-II superconductors. Results for both zero and nonzero Hall forces are considered, with the effects of nonlocal vortex interaction and vortex inertia being included within London theory. The time dependence for the nonlinear dynamics in cylindrical geometry is found to be governed by a cylindrical Kadomtsev-Petviashvili equation.
As reported by H. Haneda (Kyoto) et al., an rf magnetic field applied to superconducting YBa2Cu3O7-d subjected to a dc magnetic field generates a transverse ultrasonic wave associated with the tilt of pinned vortices. The polarization of the ultrasonic wave is parallel to the direction of vortex displacement. The inverse situation, in which an rf field is generated by an ultrasonic wave, also has been observed. Results are presented for both line and Josephson vortices.
Studies by H. H. Wen et al. (Beijing) of the critical current density Jc and relaxation rate S in (Gd1-xYx)Ba2Cu3O7-d have shown that Jc increases and S decreases when small amounts of Y are substituted for Gd in Gd-123. The authors argue that the enhanced pinning in the substituted sample is due to a local stress field induced by the lattice mismatch.
The magnetization of La2-xSrxCuO4 single crystals (x = 0.05, 0.11) before and after 5.8 GeV Pb-ion irradiation has been investigated by N. Chikumoto (Tokyo) et al. After irradiation, an increase of the hysteretic magnetization width was observed in both samples. A doublepeak structure also appeared, which can be explained as a matching effect. However, a substantial shift of the irreversibility line was found only in the underdoped crystal (x = 0.05).
123
Two possibly related puzzles regarding transport in the mixed state of YBa2Cu3O7-d are discussed by J. Clayhold (TCSUH). One of these is that the ratio rho-H_[c2]/rho_nH (rho = resistivity, H_[c2] = upper critical field, rho_n = normal-state resistivity, and H = magnetic field) is larger than unity over a wide range of magnetic fields and temperature. The other is that the electrothermal conductivity P diverges at low magnetic fields, in contrast to the behavior in Nb, where P is independent of the magnetic field. The author suggests that the two phenomena are related and are connected to the question of why the scattering rate of core electrons is much greater than the scattering rate in the normal state.
As reported by F. Yakhou (Grenoble) et al., a synchrotron-radiation study has been carried out on a crystal of YBa2Cu3O6+x with low oxygen content (x = 0.15-0.20) to investigate the 2sqrt[2 a_0] x sqrt[2 b_0] x c_0 phase, which previously has been attributed to oxygen ordering in the YBCO CuO chain layers. The authors conclude that oxygen ordering cannot account for this observed herringbone-like phase. Instead, they propose an alternative structural model that gives a good description of the diffraction pattern; it corresponds to a parasitic phase of formula BaCu3O4, which is characterized by a stacking of Cu3O4 layers connected by Ba atoms and which probably grows by epitaxy on the CuO2 planes of
The effect of annealing under elevated oxygen pressures (200 bar) upon the critical temperature of Y1-xPrxSr2Cu2.8Re0.2O6+z (z ~ 1; x = 0, 0.75) has been studied by A. Das (Meudon) et al. The authors found that Tc increased from 42 K to 55 K for the x = 0 sample and from <5 K to 14 K for the x = 0.75 sample. The authors attribute the Tc increase to a reduction in oxygen chain defects.
A preprint by N. I. Firsov and I. L. Novikov (Novosibirsk) proposes a new chemical model that assumes a valence state of +5 for Y and +1.5 for Cu in the CuO2 layers of the unit cell of YBa2Cu3O7. The authors propose that the charge carriers in this compound are localized between the CuO2 layers.
Melt-textured superconducting NdBa2Cu3O7-d (Nd-123) containing fine Nd4Ba2Cu2O10 (Nd-422) particles has been prepared by C.-J. Kim (KAERI) et al. using NBCO powder containing 1 wt% CeO2. The authors report that CeO2 strongly reduces the size of the Nd-422 precipitates. The superconducting transition temperatures of Nd-123 melt-textured in an oxygen partial pressure of P(O2) = 0.001 atm were as high as 95 K.
Bi Cuprates
Phase equilibria in the system Bi2O3-PbO-SrO-CaO-CuO have been studied by P. Majewski et al. (MPI-Stuttgart) between 650^oC and 900^oC in air with emphasis on the high-Tc phase (Bi,Pb)2+xSr2Ca2Cu3O10+d (2223). The 2223 phase is in equilibrium with a number of nonsuperconducting phases and with the superconducting phase (Bi,Pb)2Sr2CaCu2O8+d (2212). The authors report that minor compositional changes can profoundly affect the phase content of the prepared material, sometimes even resulting in the absence of the 2223 phase.
A preprint by Q. Li (Brookhaven) et al. reports a study of 25 bulk-scale Bi2Sr2CaCu2O8+d (Bi-2212) bicrystals with various degrees of [001] twist angles. The authors found that all of these twist boundaries were free of weak links and that they carried critical current as high as their constituent single crystals.
Low-angle tilt boundaries in melt-processed samples from the Bi2Sr2Can1CunOx system have been studied by Y. Yan (IRC-Cambridge) et al. Although at such boundaries the authors found local regions of the lowTc (20 K) 2201 phase, which would be highly resistive at 77 K, they also found pathways crossing the boundary plane made up of the high-Tc 2212 and 2223 phases.
Magnetization-relaxation measurements in c-axis-oriented bulk Bi2Sr2Ca2Cu3O10+d in a magnetic field of 1 T along the c axis are reported by V. V. Makarov et al. (Unicamp). For temperatures T < T_g, the authors find that the irreversible magnetization M_[irr] = M M_[eq] consists of a relaxing magnetization M_[rel] = At^[-beta] and a nonrelaxing, glass magnetization M_g; for T > T_g, M_g is absent. The authors suggest that M_g is associated with a pinning-induced misalignment between pancake vortices in different superconducting layers.
A preprint by B. I. Smirnov (Ioffe Physico-Technical Institute) et al. reports an experimental study in a gate- electrode/insulator/superconductor system of the electric-field effect on the critical current I_c and the current-voltage characteristics of large, c-axis-textured (Bi,Pb)2Sr2Ca2Cu3O10+d superconducting bars. In strong electric fields (120 MV/m) produced by a gate voltage, the critical current increased and the voltage drop along the bar at constant current decreased. The electric-field effect was reversible. The authors attribute the electric-field effect to S/I/S weak links within the Bi-2223 superconductor.
Multifilamentary (Bi,Pb)2Sr2Ca2Cu3O10+d/Ag tapes with reproducible critical current density between 1.5 x 10^4 and 2.0 x 10^4 A/cm^2 at 77 K in self-field have been achieved by N. V. Vo et al. (Wollongong) using a standard flat-rolling method as the intermediate deformation step between sintering periods. The authors have prepared tapes of length up to 43 m and have fabricated several coils (both pancake-shaped and solenoidal).
Other Cuprates
High-Tc superconducting materials with nominal compositions of Tl1xBix(Sr,Ba)2Ca2Cu3O9 (0 <= x <= 0.5) have been investigated by E. Lee (IRC-Cambridge) et al. using x-ray powder diffractometry and electron microscopy. The authors found that Tl and Bi cations were in an ordered arrangement in the (Tl,Bi)O atomic layer. The basic two-dimensional superlattice in the (Tl,Bi)O layer is 2a x 4b or 4a x 2b, with Bi cations at the center and corner of the unit-cell rectangle, giving an ideal composition with a Tl:Bi ratio of 3:1. Accordingly, the maximum Bi doping for Tl in the solid solution is 25%.
Borocarbides
Inelastic neutron-scattering experiments on powdered samples of RNi2[11]^B2C (R = Ho, Er, Tm) have been carried out by U. Gasser (ETHZurich and PSI-Villigen) et al. to determine the crystalline-electricfield (CEF) splittings of the R^[3+] ions in both the paramagnetic and magnetically ordered states of these materials. The calculated ordered magnetic moments are in agreement with magnetic neutron diffraction results; i.e., both the easy axis and the size of the zero-field moments are correctly reproduced. In addition, the entropy involved in the magnetic ordering obtained from specific-heat measurements corresponds to the number of low-lying CEF states observed in this study.
TmNi2B2C exhibits superconductivity below 11 K and magnetic ordering below 1.5 K. L. J. Chang (Warwick) et al. have done neutron-scattering experiments in powdered samples to determine the nature of the magnetically ordered state. They find that the magnetic structure is incommensurate and consists of ferromagnetic (110) planes of Tm moments aligned along the c axis with the magnitude of the moments modulated sinusoidally along the (110) direction, the modulation vector having a magnitude of 0.241 Angstrom^[-1]. The magnetic structure and modulation direction in TmNi2B2C are different from those in other RNi2B2C (R = GdEr) compounds.
Thin Films
Vertical YBa2Cu3O7-d/PrBa2Cu3O7-d/YBa2Cu3O7-d (YBCO/PBCO/YBCO) Josephson junctions using in-plane-aligned, a-axis-oriented, b/c-twin-free YBCO multilayers on (100) LaSrGaO3 (LSGO) have been fabricated by I. Takeuchi (Maryland) et al. The Tcs of the devices are typically above 80 K. Josephson coupling was observed for barrier thicknesses up to 800 Angstroms. Strongly nonlinear I-V characteristics arising from the properties of PBCO were observed in devices with thicker barriers.
Intrinsic Josephson coupling between CuO2 double layers in YBa2Cu3O7-d has been observed by M. Rapp et al. (TU-Muenchen) using direct detection of ac and dc Josephson effects. The crucial points were a reduction of the junction size to the 1-2 micrometer range and a weakening of the interlayer coupling via oxygen depletion in the CuO chain layers. The authors observed distinct signatures in the I-V characteristics and the 11 GHz microwave emission caused by ac Josephson currents. The temperature dependence of the critical current supports the idea of an SIS (superconductor-insulator-superconductor) interlayer tunneling mechanism.
A mutual-inductance technique has been used by A. Fuchs et al. (TUMuenchen) for a high-accuracy determination of the absolute London penetration depth in YBa2Cu3O7-d thin films as a function of the oxygen content. At low temperatures, the penetration depths obey power laws that depend on the sample but not on the oxygen depletion. These findings are best explained in terms of d-wave pairing with impurity scattering located in the CuO2 planes.
The transport characteristics of YyPr1-yBa2Cu3O7-d thin films and their behavior in electric-field-effect transistors (FETs) have been investigated by U. Kabasawa (Hitachi) et al. as a function of Y concentration and film thickness. Superconducting films became nonsuperconducting when the film thickness decreased beyond the value at which the film sheet resistance is equal to h/4e^2. Large electricfield effects were observed in films in the insulating phase, where the resistance modulation ratio Delta[R]/R was much greater than the carrierdensity modulation ratio Delta[N]/N.
A preprint by X.-M. Zhu et al. (Umea) reports the use of a mechanical experiment to measure the transverse force on moving vortices in a typeII superconductor. The vortices are driven into motion by the vibration of a magnet above a superconducting YBCO film, and the transverse force is measured by monitoring the motion of the superconductor in response.
Applications
As reported by M. Okada (Hitachi) et al., a compact superconducting insert magnet for a high-magnetic-field superconducting magnet system has been fabricated from Bi-2212/Ag multifilamentary tapes. The coil, made by a wind-and-react process, consisted of a stack of four double pancakes. The 288-turn coil had a 55 mm height, a 49 mm outer diameter, a 12.5 mm inner diameter, and a coil constant of 6.25 mT/A. The coil was inserted into a 21 T superconducting magnet and tested in various fields at 4.2 K. The maximum magnetic field generated by the Bi-2212 magnet was 1.76 T in an applied field of 21 T. The total magnetic field generated in the bore was therefore 22.8 T, the highest magnetic field ever achieved in an all-superconducting magnet system.
A second preprint by M. Okada (Hitachi) et al. reports the fabrication and testing of a small solenoidal coil and a persistent current switch, both constructed of Ag-sheathed Bi-2212 multifilamentary tape. The authors were able to trap a 1 kG magnetic field with a persistent current of 30 A.
The performance of high-Tc superconducting gradiometers at 77 K in fields up to 70 micro-Testa has been studied by M. N. Keene et al. (DRAMalvern) to determine the limitations of such devices in unshielded environments. The sensors incorporated first-order gradiometric YBCO SQUIDs coupled to first-order gradiometric flux transformers. The authors' best gradiometer was rugged enough to be transported and operated out of doors with no shielding. Only a minor degradation of performance (~10%) was observed.
Theory
A preprint by I. Zutic and O. T. Valls (Minnesota) considers the nonlinear transverse magnetic moment that arises in the Meissner state of superconductors with a strongly anisotropic order parameter. The authors compute the magnetic moment as a function of applied field and geometry assuming d-wave pairing for realistic samples, finite in all three dimensions, of high-Tc materials. Return currents, shape effects, and anisotropy of the penetration depth tensor are all included. The authors numerically solve the nonlinear Maxwell-London equations for a finite system. The authors predict that the nonlinear transverse magnetic moment should be readily measurable if pairing is in a d-wave state. Failure to observe it would set a lower bound to the s-wave component.
The temperature dependence of the ab-plane anisotropy of the penetration depth [lambda_a(T) and lambda_b(T)] of optimally doped YBa2Cu3O6.93 has been analyzed by W. Atkinson et al. (McMaster). The authors find that a plane-chain (CuO2-plane - CuO-chain) proximity-effect model involving a single perpendicular tunneling parameter t_[perp.] cannot account for the observations. If interplane pairing is included, however, the situation is greatly improved, provided the off-diagonal pairing is increased sufficiently to produce a gap on the chains that is of the same order of magnitude as that in the planes. The authors suggest that similar values of the gaps on the chains and planes are evidence that optimally doped YBCO is fairly three-dimensional and that the coherence length in the z direction may not be sufficiently short to allow spatial inhomogeneities to exist within a unit cell.
The effect of magnetic impurities on the temperature dependence of the critical field H_[c2] in layered superconductors has been studied by Yu. N. Ovchinnikov (Karlsruhe) and V. Z. Kresin (LBL). As a result of correlations among magnetic impurities, the scattering amplitude Gamma_s increases as T --> 0 K. This temperature dependence leads to a weakening of the pair-breaking effect, a positive curvature of H_[c2](T), and a drastically increased value of H_[c2](0). The calculations are in excellent agreement with recent experimental data.
A set of interatomic potentials for the simulation of HgBa2CaCu2O6+d (Hg-1212) has been developed by X. Zhang et al. (Singapore). These potentials have been used to reproduce the structure of Hg-1212 with discrepancies in lattice parameter of less than 0.3% and in bond length of less than 1%. Using atomistic simulation techniques, the authors found the energetically most favorable positions for excess oxygen atoms in Hg-1212. These are at (1/2,1/2,0) [the O(3) site] without partial replacement of Hg by Cu, and at (1/2,0,z=0.049) [the O(4) site] in Hg1212 with partial replacement of Hg by Cu. Both results agree with experiment.
The influence of superconducting energy-gap anisotropy on the phonon dispersion has been analyzed theoretically by A. Bill (LBL and Cottbus) et al. The authors studied superconducting order parameters with different types of s-wave, d-wave, and (s+d)-wave anisotropies and found that along certain directions of the Brillouin zone the phonon lineshape (energy and linewidth) depends strongly on gap anisotropy. The authors find that it is generally insufficient to describe experiments that involve the anisotropy of the superconducting order parameter solely in terms of its symmetry and that the specific structure of the gap as a function of k also is important. The authors find that recent experimental results on YBa2Cu3O7-d single crystals can be well described in terms of an anisotropic s-wave gap function obtained from the non-totally screened interaction of charge carriers with long-range optical phonons.
A preprint by Y. Takada (Tokyo) reports a study of a Hubbard-Holstein electron-phonon model with on-site Coulomb repulsion U_[ee] at half filling. Using exact diagonalization combined with a mean-field approximation, the author obtains accurate results in the narrowbandwidth case. Superconductivity with off-site pairing is found to exist with an inverse isotope effect if and only if the phonon-mediated attraction is almost offset by U_[ee].
A nonadiabatic polaron theory of superconductivity in AxC60, taking into account the polaron band narrowing and realistic electron-phonon and Coulomb interactions, has been developed by A. S. Alexandrov (Loughborough) and V. V. Kabanov (IRC-Cambridge). The value of the superconducting transition temperature Tc, its pressure dependence, and the isotope effect are found to be in good agreement with the available experimental data.
Other Activities
An extensive study of the out-of-plane (c-axis-polarized) optical reflectivity spectra and c-axis charge transport properties in single crystals of La2-xSrxCuO4 over a wide compositional range (0 <= x <= 0.30) is reported by S. Uchida (Tokyo) et al. The optical response in both the normal and superconducting states was investigated. In the superconducting state, the c-axis infrared optical response is characterized by a sharp plasma edge. In the underdoped regime, this is due to the Josephson plasma expected for a weakly Josephson-coupled layered superconductor.
Two preprints listed in this issue argue that superconductivity in the cuprates is localized not in the CuO2 layers but in the charge reservoirs. In one of these, H. A. Blackstead (Notre Dame) and J. D. Dow (Arizona State) examine experiments on the Tc of Zn- and Ni-doped cuprates and conclude that the data are generally inconsistent with spin-fluctuation d-wave-pairing mechanisms of superconductivity and with all two-dimensional cuprate-plane models. In the other paper, H. A. Blackstead (Notre Dame) et al. examines iodometric-titration measurements, which often are interpreted as obtaining the excess valence on Cu atoms in Y(LayBa1-y)2Cu3Ox, and reinterprets such measurements as determining concentrations of neutral or hypocharged oxygen instead. Using a hypocharged-oxygen model, the authors derive Tokura's rule, an empirical relationship between the critical oxygen content x_c and the critical La content y_c at the onset of superconductivity.
Overviews
The growth of large high-Tc single crystals by the floating-zone method has been reviewed by A. Revcolevschi and J. Jegoudez (Paris-Orsay). The authors discuss the traveling-solvent-zone method (TSZM), which is the only method allowing fabrication of centimeter-high high-Tc crystals, and focus on results in the systems Bi-Sr-Ca-Cu-O, La-Sr-Cu-O, Nd-Ce-CuO and Y-Ba-Cu-O (138 refs.).
A brief overview of the optical conductivity spectra of high-Tc copper oxides, elucidating the evolution of the superconducting gap and magnetic penetration depth with doping, has been prepared by S.-I. Uchida (Tokyo). Results in La2-xSrxCuO4 are emphasized (22 refs.).
A short review by A. J. Freeman and D. L. Novikov discusses the predictions of electronic-structure theory about the role of van Hove singularities (vHs) on the electronic structure and properties of the superconducting cuprates at ambient and high pressures. The authors stress that the results provide strong evidence for the role of vHs in the superconductivity of quasi-2D high-Tc systems. The authors discuss the vHs in the infinite-layered superconductor (Sr1-xCax)1-yCuO2 as well as in HgBa2Can-1CunO2n+2+d, Sr2CuO2F2+d, and (Ca1-xNax)2CuO2Cl2 (18 refs.).
Two overview papers, one by H. Yamauchi (Tokyo Institute of Technology, Yokohama) and M. Karppinen (Helsinki University of Technology, Espoo) and the other by H. Yamauchi et al., discuss the structures, classification, and design of the existing cuprate families. The 02(n1)n, Cu-12(n-1)n, and Pb-12(n-1)n series are used as representative examples (21 and 18 refs.)
A brief article by N. Chikumoto and M. Murakami (ISTEC-SRL) summarizes the use of the oxygen-controlled-melt-growth (OCMG) method to fabricate RBa2Cu3O7-d (R-123, R = Nd, Sm, Eu). For example, Nd-123 melt-processed in 0.1% O2 in Ar shows a sharp superconducting transition at about 96 K. The Jc of Nd-123 in high magnetic fields exceeds that of good-quality melt-processed Y-123, and the irreversibility field with H||c reaches 8 T at 77 K. The high Jc is attributed to low-Tc Nd-rich regions distributed in the Nd-123 matrix (13 refs.).
Contributed by John R. Clem
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A. S. Alexandrov and V. V. Kabanov, "Theory of Superconducting Tc of Doped Fullerenes." Submitted to Phys. Rev. B. Department of Physics, Loughborough University, Loughborough LE11 3TU, UNITED KINGDOM; V. V. Kabanov's telephone at Cambridge, UK +44 223 337072; telefax +44 223 337074. 79.60.Bm; 63.20.-e; 71.38.+i.
D. K. Aswal, S. K. Gupta, Savita N. Narang, S. C. Sabharwal, and M. K. Gupta, "On the Enlargement of c Lattice Parameter in Sputter Deposited and In-Situ Prepared Thin Films of YBa2Cu3Ox." Submitted to Thin Solid Films. Contact S. C. Sabharwal, Technical Physics and Prototype Engineering Division, Bhabha Atomic Research Centre, Trombay, Bombay 400 085, INDIA; telephone +91 22 5563060 ext. 2310; telefax +91 22 5560750.
W. Atkinson, J. P. Carbotte, and C. O'Donovan, "a-b Plane Anisotropy in YBCO." To be published in the Proc. of the BICAS Summer School on Symmetry of the Order Parameter in High-Temp. Supercond. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, CANADA; preprint also available at cond-mat@xxx.lanl.gov (#9604104).
A. Baldini, E. Borchi, R. Garre, A. Lascialfari, L. Masi, and A. Peruzzi, "Transport and ac Susceptibility Critical Currents in Ag Sheathed Bi(Pb)2223 Tapes." To be published in Physica C, Vol. 261 (in press). Contact E. Borchi, Dipartimento de Energetica, Universita di Firenze, Via S. Marta 3, I- 50139 Firenze, ITALY; telefax +39 55 4796342; e-mail borchi@fi.infn.it.
E. Ben-Naim, J. B. Knight, and E. R. Nowak, "Slow Relaxation in Granular Compaction." James Franck Institute, University of Chicago, Chicago, IL 60637. 05.40.+j; 81.20.Ev; 82.65.My.
A. Bill, V. Hizhnyakov, and E. Sigmund, "q Dependent Neutron Scattering: A Signature of the Gap Anisotropy in High-Tc Superconductors." To be published in J. Supercond. Lawrence Berkeley Laboratory, 1 Cyclotron Road, MS 62-203, Berkeley, CA 94720; telephone (510) 486-6991 or -4000; telefax (510) 486-4995; e-mail abill@lbl.gov.
Howard A. Blackstead and John D. Dow, "Pair Breaking as a Probe of dWave High-Temperature Superconductivity." To be published in J. Supercond., Vol. 9, No. 2, 1996. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556; telephone (219) 631-7078; telefax (219) 631-5752; e-mail blackstd@rems1.phys.nd.edu. Key words: pair breaking, d-wave superconductivity, charge-reservoir superconductivity.
Howard A. Blackstead, John D. Dow, and David B. Pulling, "Iodometric Titration of Copper-Oxide Superconductors, and Tokura's Rule." To be published in Physica C (in press). Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556; telephone (219) 631-7078; telefax (219) 631-5752; e-mail blackstd@rems1.phys.nd.edu. 74.20.Fg; 74.70.Vy.
Ernst Helmut Brandt, "Superconductors of Finite Thickness in a Perpendicular Magnetic Field: I. Strips and Slabs." Submitted to Phys. Rev. B. Max-Planck-Institut fuer Metallforschung, Institut fuer Physik, D-70506 Stuttgart, GERMANY. 74.60.-w; 74.60.Ge.
Ernst Helmut Brandt, "Universality of Flux Creep in Superconductors with Arbitrary Shape and Current-Voltage Law." To be published in Phys. Rev. Lett. Max-Planck-Institut fuer Metallforschung, Institut fuer Physik, D-70506 Stuttgart, GERMANY. 74.60.-w; 74.20.Hi.
Y. Cao, X. D. Qiu, Q. M. Lin, Y. Y. Xue, and C. W. Chu, "Pressure Effects on Tc of HgBa2Can-1CunO2n+2+d with n >= 4." Preprint #96:053; submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 7438201; e-mail preprints@www.tcs.uh.edu.
L. J. Chang, C. V. Tomy, D. McK. Paul, and C. Ritter, "Magnetic Structure of TmNi2B2C." Submitted to Phys. Rev. B. Contact C. V. Tomy, Department of Physics, University of Warwick, Coventry CV4 7AL, UNITED KINGDOM; telefax +44 1203 692 016; e-mail phrrh@csv.warwick.ac.uk. 61.12.Gz; 75.25.+z; 74.70.-b.
N. Chikumoto and M. Murakami, "Strong Flux Pinning in RE123 Grown by Oxygen-Controlled Melt Process." Submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Superconductivity Research Laboratory, International Superconductivity Technology Center (ISTEC), 1-16-25 Shibaura, Minato-ku, Tokyo 105, JAPAN.
Noriko Chikumoto, Kohji Kishio, Tsuyoshi Kimura, and Takayuki Terai, "Neutron Irradiation Effect on the Secondary Peak Observed in the Magnetization Curves of La214 Single Crystals." To be published in the Proc. of the 8th Int. Symp. on Supercond. (ISS'95), Hamamatsu, Japan, Oct. 30-Nov. 2, 1995. Superconductivity Research Laboratory, International Superconductivity Technology Center (ISTEC), 1-16-25 Shibaura, Minato-ku, Tokyo 105, JAPAN. Key words: (La1-xSrx)2CuO4-d, neutron irradiation, flux pinning, peak effect, synchronization peak.
Noriko Chikumoto, Marcin Konczykowski, Kohji Kishio, Tsuyoshi Kimura, and Takayuki Terai, "Effect of Heavy Ion Irradiation on the Magnetization of La214 Single Crystals." To be published in the Proc. of the 8th Int. Symp. on Supercond. (ISS'95), Hamamatsu, Japan, Oct. 30Nov. 2, 1995. Superconductivity Research Laboratory, International Superconductivity Technology Center (ISTEC), 1-16-25 Shibaura, Minatoku, Tokyo 105, JAPAN. Key words: (La1-xSrx)2CuO4-d, heavy-ion irradiation, columnar defect, flux pinning, peak effect.
M. Chopra, S. W. Chan, V. S. Boyko, R. L. Meng, and C. W. Chu, "Twin Structure in Large Grains of YBa2Cu3O7-d as Affected by the Dispersion and Volume Fractions of Y2BaCuO5." Preprint #96:048; submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Contact Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 7438201; e-mail preprints@www.tcs.uh.edu.
J. A. Clayhold, "Two Related Mysteries of Dissipation in the Mixed State of YBa2Cu3O7-d." Preprint #96:050; submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 743-8201; e-mail preprints@www.tcs.uh.edu.
Mark W. Coffey, "Nonlinear Dynamics of Vortices in Ultraclean Type-II Superconductors: Integrable Wave Equations in Cylindrical Geometry." To be published in Phys. Rev. B. Department of Chemistry, Regis University, 3333 Regis Boulevard, Denver, CO 80221. Key words: vortex dynamics, ultraclean superconductor, Hall force, cylindrical Korteweg-de Vries equation, cylindrical Kadomtsev-Petviashvili equation, nearly concentric Korteweg-de Vries equation, nonlocal interaction, London theory, reductive perturbation theory, solitons. 41.20.Jb.; 03.40.Kf; 74.60.Ge; 74.20.De.
A. Crisan, L. Miu, S. Popa, and G. Aldica, "On the Dissipation Process in Bi2Sr2Ca2Cu3O10 Tapes and Bulk Samples with Preferential Grain Orientation in Zero External Magnetic Field." To be published in J. Supercond. Institute of Physics and Technology of Materials, P.O. Box MG-7, Bucharest, ROMANIA. Key words: tapes, grain orientation, dissipation, critical current density, vortex-antivortex unbinding.
A. Crisan, S. Popa, G. Aldica, and J. Jaklovszky, "Temperature-Dependent Collective Pinning Exponent in Bi2Sr2Ca2Cu3O10+x Tapes and Bulk Samples with Preferential Crystallite Orientation." To be published in J. Supercond. Institute of Physics and Technology of Materials, P.O. Box MG-7, Bucharest, ROMANIA. Key words: tapes, oriented bulk samples, I-V curves, collective pinning.
A. Das, R. Suryanarayanan, and B. Dabrowski, "Enhancement of Tc in Y1xPrxCu2.8Re0.2O6+z (z~1; x=0, 0.75) Due to the Elevated Oxygen Pressure Annealing." To be published in Solid State Commun. Contact R. Suryanarayanan, Laboratoire de Chimie des Solides, UA446, CNRS, Universite Paris-Sud, F-91405 Orsay, FRANCE; telephone +33 69 41 70 18; telefax +33 69 85 54 22; e-mail suryan@isma.isma.u-psud.fr.
S. Y. Ding, Y. Rui, H. M. Shao, J. Li, X. N. Xu, J. W. Lin, C. Ren, X. X. Yao, X. S. Rong, B. Ying, and Z. X. Zhao, "Flux-Creep Mechanism Studied in Extended Windows for the HgBa2Ca2Cu3Oy Superconductor." To be published in Physica C (in press). Department of Physics and Center for Advanced Studies in Science and Technology of Microstructures, Nanjing University, Nanjing 210093, PEOPLE'S REPUBLIC OF CHINA; telefax +86 25 3300 535; e-mail naiben@bepc2.ihep.ac.cn.
Z. L. Du, Y. Cao, Y. Y. Sun, L. Gao, Y. Y. Xue, and C. W. Chu, "Superconducting Phases in the Sr-Cu-O System." Preprint #96:047; submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 7438201; e-mail preprints@www.tcs.uh.edu.
V. V. Eremenko, I. S. Kachur, V. G. Piryatinskaya, A. M. Ratner, and V. V. Shapiro, "Effect of Potential Relief on Superconductivity Revealed by Time Variations in Y-Ba-Cu-O Superconductor Properties under Illumination." To be published in Physica C 261 (in press). Contact V. V. Shapiro, Institute for Low Temperature Physics and Engineering, Science Academy of Ukraine, 47 Lenin Ave., 310164 Kharkov, UKRAINE; email shapiro@ilt.kharkov.ua.
I. Felner, J. Gersten, A. Minakov, M. Merzlyakov, and Yu. Bugoslavsky, "Paramagnetic Properties of the Sr Overdoped (La,Sr)2CuO4 System." To be published in Physica C, Vol. 260 (in press). Racah Institute of Physics, The Hebrew University, Jerusalem 91904, ISRAEL; telefax +972 2 658 6347; e-mail israela@vms.huji.ac.il.
N. I. Firsov and I. L. Novikov, "The Physico-Chemical Model of Unit Cell YBa2Cu3O6+x." Department of Semiconductive Devices and Microelectronics, Novosibirsk State Technical University, 20 Karl MarxProspekt, Novosibirsk 630092, RUSSIA. Key words: high-temperature superconductivity, crystal structure, unit cell, yttrium.
A. J. Freeman and D. L. Novikov, "Inside HTc Superconductors: An Electronic Structure View." Submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Science and Technology Center for Superconductivity, Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Room 2345, Evanston, IL 60208-3112; telephone (847) 491-3343; telefax (847) 491-5082; e-mail art@freeman.phys.nwu.edu.
A. Fuchs, W. Prusseit, P. Berberich, and H. Kinder, "High Precision Penetration Depth Measurement of YBa2Cu3O7-d as a Function of Oxygen Content." To be published in Phys. Rev. B. Physik Department E10, Fakultaet fuer Physik, Technische Universitaet Muenchen, James-FranckStr. 1, D-85747 Garching, GERMANY; W. Prusseit's telephone +49 89 3209 2407; telefax +49 89 3209 2414; e-mail werner.prusseit@physik.tumuenchen.de. 74.30.-e; 74.30.Ci; 74.75.+t.
U. Gasser, P. Allenspach, F. Fauth, W. Henggeler, J. Mesot, A. Furrer, S. Rosenkranz, P. Vorderwisch, and M. Buchgeister, "Neutron CrystalField Spectroscopy of RNi2[11]^B2C (R=Ho, Er, Tm)." Published in Z. Phys. B. Laboratory for Neutron Scattering, ETH Zurich & Paul-ScherrerInstitut, CH-5232 Villigen PSI, SWITZERLAND; telephone +41 56 310 21 11; telefax +41 56 310 29 39; e-mail gasser@psi.ch. 61.12.-q; 71.70.Ch; 74.25.Ha.
Yuri A. Genenko, "Helical Instability of a Magnetic Flux Line in a Current-Carrying Superconducting Film." To be published in Phys. Rev. B (in press). Donetsk Physicotechnical Institute of the National Academy of Sciences of Ukraine, 340114 Donetsk, UKRAINE. 74.25.Ha; 74.60.Ec; 74.60.Jg; 74.76.-w.
H. Haneda, T. Ishiguro, and M. Murakami, "Generation and Detection of Transverse Ultrasonic Waves via Vortex Tilting in Superconductive YBa2Cu3O7." To be published in Appl. Phys. Lett. Department of Physics, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606-01, JAPAN; e-mail haneda@ss.scphys.kyoto-u.ac.jp. 74.60.Ge; 74.72.Bk; 43.35.Ty; 85.25.Qc.
Jian-Min Hao, Ye-Li Wen, Bing-Chuan Yang, Xiao-Ping Wang, and Dong-Qi Shi, "Estimation of Oxygen Content and Observation of X-ray Reflection Anomalous Broadening in Epitaxial YBa2Cu307-y on LaAlO3." To be published in Physica C (in press). Tianjin Electronic Materials Research Institute, P.O. Box 55, Tianjin 300192, PEOPLE'S REPUBLIC OF CHINA.
Takashi Hikihara, "A Study on Chaotic Levitated Motion of High-Tc Superconducting Bearing: Multi-Fractal to Chaotic Vibration and Hysteresis." To be published in the Proc. of the Int. Symp. on Analysis and Syntheses of Nonlinear Dynamical Systems in Mechanics, Riga, Latvia, June 3-7, 1996. Department of Electrical Engineering, Kansai University, Yamate-cho 3-3-35, Suita, Osaka 564, JAPAN; telephone +81 6 368 0914; telefax +81 6 388 8843; e-mail hikihara@ipcku.kansai-u.ac.jp.
Takashi Hotta and Yasutami Takada, "Dynamical LocalizationDelocalization Transition in the Infinite-Dimensional Hubbard-Holstein Model." Preprint #ISSN 0082-4798; to be published in Phys. Rev. Lett. Institute for Solid State Physics, University of Tokyo, 7-22-1 Roppongi, Minato-ku, Tokyo 106, JAPAN. 71.28.+d; 71.30.+h; 71.10.Fd; 71.38.+i.
C. Y. Huang, J. G. Lin, P. H. Hor, R. L. Meng, and C. W. Chu, "Magnetic Properties of Some High-Temperature Superconductors." Preprint #96:049; submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Contact Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 743-8201; e-mail preprints@www.tcs.uh.edu.
Prafulla K. Jha and Sankar P. Sanyal, "A Lattice Dynamical Study of the Role of Pressure on Raman Modes in High-Tc HgBa2CuO4." To be published in Physica C, Vol. 260 (in press). Materials Research Laboratory, Department of Physics, University of Bhopal, Bhopal 462 026, INDIA.
Ming Jiang, W. E. Delaney, M. T. Lanagan, S. R. Olson, and K. C. Goretta, "Phase Development in Partial-Melt Processing of Silver-Clad Bi2.15Sr1.83Ca1.02Cu2Ox Tapes." To be published in the Proc. of the Symp. on High-Temperature Superconductors: Synthesis, Processing, and Large Scale Applications, Anaheim, CA, Feb. 4-8, 1996. Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439; telefax (708) 252-9595; e-mail janice_coble@qmgate.anl.gov.
Uki Kabasawa, Yoshinobu Tarutani, Tokuumi Fukazawa, Nobuyuki Sugii, Haruhiro Hasegawa, and Kazumasa Takagi, "Superconductor-Insulator Transition and Electric Field Effect of YyPr1-yBa2Cu3O7-x Thin Films." To be published in J. Appl. Phys., Vol. 79, No. 10 (in press). Central Research Laboratory, Hitachi, Ltd., 1-280 Higashi-koigakubo, Kokubunji, Tokyo 185, JAPAN; telephone +81 423 23 1111; telefax +81 423 27 7722; email uki-crl.kabasawa@c-net3.crl.hitachi.co.jp.
M. Karppinen, H. Yamauchi, T. Ito, H. Suematsu, and O. Fukunaga, "HighPressure Synthesis and Thermal Decomposition of LaCuO3." Presented at the 2nd Int. Symp. on Oxide Electronics, Yokohama, Japan, Dec. 14-15, 1995; to be published in Mater. Sci. Eng. B (in press). Center for Ceramics Research, Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, JAPAN; H. Yamauchi's telephone +81 45 924 5315; telefax +81 45 921 6953; e-mail yamauchi@materia.titech.ac.jp.
M. Karppinen, H. Yamauchi, H. Suematsu, and O. Fukunaga, "Synthesis and Properties of Various LaCuO3-y Samples with Different Oxygen Contents." To be published in Physica C (in press). Center for Ceramics Research, Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, JAPAN; H. Yamauchi's telephone +81 45 924 5315; telefax +81 45 921 6953; e-mail yamauchi@materia.titech.ac.jp.
Masatsune Kato, Tadashi Adachi, and Yoji Koike, "Spin Gap of the OneDimensional CuO2 Chains in Sr14-yYyCu24O41-d." To be published in Physica C (in press). Department of Applied Physics, Faculty of Engineering, Tohoku University, Aramaki Aoba, Aoba-ku, Sendai 980-77, JAPAN; telefax +81 22 217 7975; e-mail mkato@mlab.apph.tohoku.ac.jp. Key words: Sr14-yYyCu24O41-d, spin gap, magnetic susceptibility, CuO2 chain, spin-1/2 ladder.
Masatsune Kato, Atsushi Sakuma, Takashi Noji, and Yoji Koike, "Synthesis of the Pb-Based Superconductor of the Pb3201 Phase (Pb2Cu)Sr0.9La1.1CuO6+d by the Modified Polymerized-Complex-Method." To be published in Physica C (in press). Department of Applied Physics, Faculty of Engineering, Tohoku University, Aramaki Aoba, Aoba-ku, Sendai 980-77, JAPAN; telefax +81 22 217 7975; e-mail mkato@mlab.apph.tohoku.ac.jp. Key words: (Pb2Cu)Sr0.9La1.1CuO6+d, polymerized complex method, gel, Pb3201 phase, synthesis.
M. Kaufmann, M. Baumann, R. Behr, G. Wirth, and J. Koetzler, "VortexFluid Dynamics and Bose-Glass Ordering in Bi2Sr2CaCu2O8." Submitted to the XXI Int. Conf. on Low Temperature Physics (LT 21), Prague, Czech Republic, Aug. 8-14, 1996. Institut fuer Angewandte Physik, Universitaet Hamburg, Jungiusstrasse 11, D-20355 Hamburg, GERMANY; telefax +49 40 41236368.
M. N. Keene, N. J. Exon, R. G. Humphreys, and N. G. Chew, "The Influence of Ambient Magnetic Evnironments on High-Tc Superconducting Quantum Interference Device Gradiometers." To be published in J. Appl. Phys., Vol. 79, No. 11, June 1, 1996. DRA, St. Andrews Road, Malvern, Worcestershire WR14 3PS, UNITED KINGDOM; telephone +44 1684 896352; telefax +44 1684 894311; e-mail keene@dra.hmg.gb.
Chan-Joong Kim, Hai-Woong Park, Ki-Baik Kim, Kyu-Won Lee, Il-Hyun Kuk, and Gye-Won Hong, "Size Reduction of Nd4Ba2Cu2O10 Second Phase Particles in NdBa2Cu3O7-y Melt-Textured at Reduced Oxygen Partial Pressure (PO2 = 0.001 atm)." Submitted to Mater. Lett. Superconductivity Research Laboratory, Korea Atomic Energy Research Institute, P.O. Box 105, Yusung, Taejon 305-600, SOUTH KOREA; telephone +82 42 868 8025; telefax +82 42 862 5496. Key words: size reduction, Nd4Ba2Cu2O10, melt-texture growth, CeO2 addition.
L. A. Klinkova, V. I. Nicolaichik, L. V. Zorina, N. V. Barkovskii, V. K. Fedotov, and S. A. Zverkov, "The New Homologous Series BamBim+nOy (m = 1,2,...; n = 0,1,2,...)." To be published in Zh. Neorg. Khimii, Vol 41, No. 5. Abstract in English, paper in Russian. Institute of Solid State Physics, RAS, Chernogolovka, Moscow District 142432, RUSSIA; telephone +7 95 524-50-51; telefax +7 95 576-41-11; e-mail klinkova@issp.ac.ru.
T. Kluge, A. Fujiwara, M. Kato, and Y. Koike, "Iodine Intercalcation in Bi2Sr2Ca(Cu1-zCoz)2O8+d with Different d Values." To be published in Phys. Rev. B (in press). Contact Y. Koike, Department of Applied Physics, Faculty of Engineering, Tohoku University, Aramaki Aoba, Aobaku, Sendai 980-77, JAPAN; telephone +81 22 217 7977; telefax +81 22 217 7975; e-mail koike@mlab.apph.tohoku.ac.jp. 74.62.-c; 74.62.Dh; 71.20.
Juergen Koetzler, Gerd Nakielski, and Gerhard Wirth, "Bose-Glass Transition in Thin YBa2Cu3O7-d Films." Submitted to the XXI Int. Conf. on Low Temperature Physics (LT 21), Prague, Czech Republic, Aug. 8-14, 1996. Institut fuer Angewandte Physik, Universitaet Hamburg, Jungiusstrasse 11, D-20355 Hamburg, GERMANY; Gerd Nakielski's telephone +49 40 41236728; telefax +49 40 41236368; e-mail nakielski@physnet.unihamburg.de.
D. Kouzoudis, "Heisenberg Exchange Model for a Ring Consisting of a Prime Number of Atoms with Spin 1/2." Ames Laboratory-USDOE and Department of Physics, Iowa State University, Ames, IA 50011-3020; telephone (515) 294-3737; e-mail dimitris@iastate.edu. 75.30.Ds.
E. Lee, S. Wu, W. Zhou, and W. Y. Liang, "Ordering of Tl and Bi in BiDoped Tl-1223 High Tc Superconductors." To be published in J. Appl. Phys, July 1996. Contact S. Wu, IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, UNITED KINGDOM; telephone +44 1223 337443; telefax +44 1223 337074; e-mail sw204@cus.cam.ac.uk.
Qiang Li, Y. N. Tsay, Y. M. Zhu, M. Suenaga, G. D. Gu, and N. Koshizuka, "Absence of Weak Link of High-Angle Bi2Sr2CaCu2O8+d [001] Twist Grain Boundaries." Department of Applied Sciences, Brookhaven National Laboratory, Upton, NY 11973.
Q. M. Lin, Y. Y. Sun, Y. Y. Xue, and C. W. Chu, "Synthesis Conditions and Tc of Hg1-xBa2Can-1CunO2n+2+d with n <= 6." Preprint #96:051; submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 7438201; e-mail preprints@www.tcs.uh.edu.
Sern-Hau Lin and Nae-Lih Wu, "Sub-Solidus Relations in CaO-BaO-CuO With and Without Carboxyl Contaminiation." To be published in Physica C, Vol. 260 (in press). Contact Nae-Lih Wu, Department of Chemical Engineering, National Taiwan University, Taipei, TAIWAN; telefax +886 2 362 7158; e-mail nlw001@ccms.ntu.edu.tw.
Peter Majewski, Stefanie Kaesche, and Fritz Aldinger, "Fundamental Material Aspects Underlying the Preparation of High Temperature Superconducting (Bi,Pb)2+xSr2Ca2Cu3O10+d Ceramics." Submitted to J. Am. Ceram. Soc. Max-Planck-Institut fuer Metallforschung, Pulvermetallurgisches Laboratorium, Heisenbergstr. 5, D-70569 Stuttgart, GERMANY. Key words: HTc superconductors, phase diagrams, preparation.
V. V. Makarov and Y. Kopelevich, "Vortex-Glass-Type Transition in YBa2Cu3O7-d Ceramics." To be published in Phys. Rev. B. Instituto de Fisica "Gleb Wataghin," Universidade Estadual de Campinas, Unicamp, 13083-970 Campinas, Sao Paulo, BRAZIL; e-mail makarov@ifi.unicamp.br. 74.60.Ge; 74.72.Bk; 74.80.Bj.
V. V. Makarov, Y. Kopelevich, and S. Moehlecke, "Frozen Magnetization in Bi2Sr2Ca2Cu3O10." To be published in Physica C. Instituto de Fisica "Gleb Wataghin," Universidade Estadual de Campinas, Unicamp, 13083-970 Campinas, Sao Paulo, BRAZIL; e-mail makarov@ifi.unicamp.br. Key words: high-Tc superconductors, flux creep, glassy vortex state, thermal depinning.
J. H. Miller, Jr., N. Tralshawala, J. R. Claycomb, J. H. Xu, and K. Nesteruk, "Magnetocardiography in a Magnetically Noisy Environment Using High-Tc SQUIDs." Preprint #96:045; submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 743-8201; e-mail preprints@www.tcs.uh.edu.
Lance L. Miller, "The Response of Longitudinal and Transverse Pickup Coils to a Misaligned Magnetic Dipole." Submitted to Rev. Sci. Instrum. Ames Laboratory-USDOE, Iowa State University, Ames, IA 50011-3020; telephone (515) 294-6816; telefax (515) 294-0689; e-mail miller@ameslab.gov.
Hironaru Murakami, Shin-ichi Hiramatsu, and Ryozo Aoki, "Characteristics of Planar Tunneling Junctions on BSCCO Crystal: Oxygen Ion Beam Irradiation Effect." To be published in Physica C (in press). Department of Electrical Engineering Suita, Osaka University, Osaka 565, JAPAN; telefax +81 6 875 0506; e-mail murakami@gene.pwr.eng.osakau.ac.jp.
Satoru Nakajima, Takeo Oku, Kenzo Nagase, and Yasuhiko Syono, "Superconductivity in the Overdoping State of the (Hg,Tl)(Ba,La)2CuOv and (Hg,Tl)2Ba2CuOv Systems." To be published in Physica C, Vol. 260 (in press). Department of Chemistry, Tohoku University, Kawauchi, Aobaku, Sendai 980-77, JAPAN; telefax +81 22 263 9279.
V. N. Naumov, G. I. Frolova, E. B. Amitin, V. E. Fedorov, and P. P. Samoilov, "Electron Heat Capacity and Moments of Phonon Density of States of HoBa2Cu3O7-d." To be published in Physica C, Vol. 260 (in press). Contact G. I. Frolova, Institute of Inorganic Chemistry, Novosibirsk 630090, RUSSIA; telefax +7 3832 35 59 60.
E. R. Nowak, O. W. Taylor, Li Liu, H. M. Jaeger, and T. J. Selinger, "Depinning Dynamics of Superconducting Vortices: Tuning the Avalanche Behavior." James Franck Institute and Department of Physics, University of Chicago, Chicago, IL 60637. 74.60.Ge; 64.60.Ht; 05.40.+j.
Michiya Okada, Keiji Fukushima, Kazuhide Tanaka, Hiroaki Kumakura, Kazumasa Togano, Tsukasa Kiyoshi, and Kiyoshi Inoue, "Relaxation of Trapped Magnetic Field in a Bi-2212/Ag Solenoidal Coil with Persistent Current Switch." To be published in Jpn. J. Appl. Phys. Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Ohmika-cho, Hitachi Ibaraki 319-12, JAPAN. Key words: persistent current switch, Bi2Sr2Ca1Cu2Ox, multifilamentary tape, solenoidal coil, oxide superconductor.
Michiya Okada, Kazuhide Tanaka, Keiji Fukushima, Junichi Sato, Hitoshi Kitaguchi, Hiroaki Kumakura, Tsukasa Kiyoshi, Kiyoshi Inoue, and Kazumasa Togano, "Bi-2212/Ag Superconducting Insert Magnet for High Magnetic Field Generation over 22 T." To be published in Jpn. J. Appl. Phys. Hitachi Research Laboratory, Hitachi, Ltd., 7-1-1 Ohmika-cho, Hitachi Ibaraki 319-12, JAPAN. Key words: high-field magnet, Bi-2212 superconductor, multifilamentary wire.
V. D. Okunev, N. N. Pafomov, V. M. Svistunov, S. J. Lewandowski, P. Gierlowski, and W. Kula, "Percolation Metal-Insulator Transition in BiSrCaCuO Films." To be published in Physica C (in press). PhysicoTechnical Institute of National Academy of Sciences, 340114 Donetsk, UKRAINE; telefax +7 0622 55 01 27.
Yu. N. Ovchinnikov and V. Z. Kresin, "Recovery of Superconductivity and Critical Field in Layered Superconductors." To be published in Phys. Rev. B. Institute for Condensed Matter Theory, University of Karlsruhe, D-76128 Karlsruhe, GERMANY.
R. Prozorov, A. Poddar, E. Sheriff, A. Shaulov, and Y. Yeshurun, "Irreversible Magnetization in Thin YBCO Films Rotated in External Magnetic Field." To be published in Physica C. Institute for Superconductivity, Department of Physics, Bar-Ilan University, 52900 Ramat-Gan, ISRAEL; telephone +972 3 5318433/4; telefax +972 3 5353298; e-mail ruslan@physnet.ph.biu.ac.il or http://www.biu.ac.il:80/~prozorr/preprints.html. 74.60.-w; 74.25.Ha; 74.60.Ec; 74.60.Ge; 74.60.Jg.
M. J. Qin, S. Y. Ding, C. Ren, X. X. Yao, Y. X. Fu, C. B. Cai, T. S. Shi, and G. Y. Wang, "Logarithmic U(j) Relationship in Melt-Textured Growth YBa2Cu3O6+x by ac Susceptibility Measurements." To be published in Physica C (in press). Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Center for Advanced Studies in Science and Technology of Microstructures, Nanjing 210093, PEOPLE'S REPUBLIC OF CHINA; telefax +86 25 3307965.
M. Rapp, A. Murk, R. Semerad, and W. Prusseit, "c-Axis Conductivity and Intrinsic Josephson Effects in YBa2Cu3O7-d." To be published in Phys. Rev. Lett. Physik Department E10, Fakultaet fuer Physik, Technische Universitaet Muenchen, James-Franck-Str. 1, D-85747 Garching, GERMANY; W. Prusseit's telephone +49 89 3209 2407; telefax +49 89 3209 2414; email werner.prusseit@physik.tu-muenchen.de. 74.50.+r; 74.80.Dm; 74.60.Jg; 74.72.Bk.
Z. F. Ren, C. A. Wang, and J. H. Wang, "Growth of Superconducting Epitaxial Tl2Ba2CuO6+d Thin Films with Tetragonal Lattice and Continuously Adjustable Critical Temperature." To be published in the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Superconductive Materials Laboratory, New York State Institute on Superconductivity and Department of Chemistry, SUNY at Buffalo, Buffalo, NY 14260-3000.
A. Revcolevschi and J. Jegoudez, "Growth of Large High-Tc Single Crystals by the Floating Zone Method: A Review." Laboratoire de Chimie des Solides, Universite Paris-Sud, Batiment 414, F-91405 Orsay Cedex, FRANCE; telephone +33 1 69 41 61 07 or 70 18; telefax +33 1 69 85 54 22; e-mail revco@psisun.u-psud.fr.
J. Robert, P. Petit, and J. E. Fischer, "Phase Transformations and Kinetics Studies of Phase Instabilities in KC60." To be published in Physica C (in press). Institut Charles Sadron, CNRS-ULP, 6 Rue Boussingault, F-67000 Strasbourg, FRANCE; telefax +33 884 14099; e-mail jr@leto.u-strasbg.fr.
Seungoh Ryu, A. Kapitulnik, and S. Doniach, "Field-Driven Topological Glass Transition in a Model Flux Line Lattice." Department of Physics, Ohio State University, Columbus, OH 43021; e-mail ryu@pacific.mps.ohiostate.edu.
B. Ait Salah, M. Mansori, M. A. Fremy, M. H. Pischedda, M. Roubin, A. Benlhachemi, H. Benyaich, and J. R. Gavarri, "High-Tc Superconductor/Silver Composites: A New Direct Preparation Process." To be published in Physica C , Vol. 260 (in press). Contact J. R. Gavarri, Lab. MMI, Universite de Toulon et du Var, BP 132, F-83957 La Garde, FRANCE; telefax +33 94 14 23 11.
Th. Schurig, S. Menkel, Z. Quan, J. Beyer, B. Guettler, S. Knappe, and H. Koch, "Large-Area YBCO Thin Film Deposition Using Linear Hollow Cathode Discharge Sputtering." To be published in Physica C, Vol. 260 (in press). Physikalisch-Technische Bundesanstalt, Abbestr. 2-12, 10587 Berlin, GERMANY.
J. B. Shi, H. J. Tsao, and M. F. Tai, "Superconductivity and Magnetism of the (Hg0.7Bi0.3)Sr2(Ca1-xPrx)Cu2O6+d System." To be published in Physica C, Vol. 260 (in press). Department of Electronic Engineering, Feng Chia University, Taichung 407, TAIWAN; telefax +886 4 4510405.
M. Shvartser, M. Gitterman, and B. Ya. Shapiro, "Dynamics of Helical Vortices in a Superconducting Wire." To be published in Physica C. Institute of Superconductivity, Department of Physics, Bar-Ilan University, 52100 Ramat Gan, ISRAEL; B. Ya. Shapiro's telephone +972 3 5318980; telefax +972 3 5353298; e-mail f67410@barilvm.bitnet. 74.60.Ge; 85.25.Kx.
Alok Singh, P. Kuppusami, E. Mohandas, S. Raju, and V. S. Raghunathan, "Low Angle and Special Boundaries in Sintered YBa2Cu3O7-d." To be published in Physica C (in press). Physical Metallurgy Section, Metallurgy Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, INDIA.
H. K. Singh, A. K. Saxena, and O. N. Srivastava, "The Formation and Characterization of Tl Doped Hg-Ba-Ca-Cu-O Superconducting Films Synthesised Through Spray Pyrolysis." To be published in Physica C, Vol. 260 (in press). Contact O. N. Srivastava, Department of Physics, Banaras Hindu University, Varanasi 221 005, INDIA; telefax +91 54 231 2059.
B. I. Smirnov, T. S. Orlova, A. N. Kudymov, M. T. Lanagan, M. P. Chudzik, Nan Chen, and K. C. Goretta, "Electric Field Effect in (BiPb)2Sr2Ca2Cu3Ox Superconductor Bars." Submitted to Physica C. Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg 194021, RUSSIA. Contact Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439; telefax (708) 252-9595; e-mail janice_coble@qmgate.anl.gov.
S. Stassen, A. Vanderschueren, N. Mazeas, A. Rulmont, M. Ausloos, and R. Cloots, "Bi Based 2223 Superconducting Materials Prepared by the 'Glassy-Matrix' Precursor Method: Influence of the Nature of the Additional Crystalline Precursor." To be published in Physica C (in press). S.U.P.R.A.S., Chemistry Institute B6, University of Liege, Sart -Tilman, 4000 Liege, BELGIUM; telefax +32 41 66 34 13; A. Vanderschueren's email vds@montefiore.ulg.ac.be.
Kimihito Tagaya, Yuji Kurokawa, and Hiroyuki Sasakura, "Microwave Magnetoabsorptions of Bi2(Ca,Gd,Bi)3Cu2Oz Superconductor." To be published in Physica C, Vol. 260 (in press). Department of Materials Science, University of Osaka Prefecture, Sakai, Osaka 593, JAPAN; telefax +81 722 552981.
Yasutami Takada, "Superconductivity in the Half-Filled Hubbard-Holstein Model in the Antiadiabatic Region." Preprint #ISSN 0082-4798; to be published in J. Phys. Soc. Jpn. 65, No. 6. Institute for Solid State Physics, University of Tokyo, 7-22-1 Roppongi, Minato-ku, Tokyo 106, JAPAN. Key words: superconductivity, CDW, SDW, isotope effect, narrow band, bipolaron, electron correlation.
Yasumasa Takao, Masanobu Awano, and Yoshitaka Kuwahara, "Preparation and Properties of Composite Particles by Electrostatic Process." National Industrial Research Institute of Nagoya 1-1, Hirate-cho, Kita-ku, Nagoya 462, JAPAN; telefax +81 52 916 6992; e-mail takao@nirin.go.jp.
I. Takeuchi, P. A. Warburton, Z. Trajanovic, C. J. Lobb, Z. W. Dong, T. Venkatesan, M. A. Bari, W. E. Booij, E. J. Tarte, and M. G. Blamire, "Fabrication of In-Plane Aligned a-Axis Oriented YBa2Cu3O7-x Trilayer Josephson Junctions." To be published in Appl. Phys. Lett. Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742; e-mail takeuchi@squid.umd.edu.
Masayuki Tanaka, Masashi Hasegawa, and Humihiko Takei, "Growth and Anisotropic Physical Properties of SrCuO2 Single Crystals." To be published in Physica C (in press). Institute for Solid State Physics, University of Tokyo, 7-22-1 Roppongi, Minato-ku, Tokyo 106, JAPAN; email schenker@takeilad.issp.u.tokyo.ac.jp.
Z. Trajanovic, I. Takeuchi, P. A. Warburton, C. J. Lobb, and T. Venkatesan, "Grain Growth and Grain Boundaries in In-Plane Aligned aAxis Oriented YBa2Cu3O7-x Films on (100) LaSrGaO4." To be published in Physica C. Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742; e-mail zt3@umail.umd.edu.
N. Tralshawala, J. R. Claycomb, J. H. Xu, and J. H. Miller, Jr., "Noise Reduction Techniques for Operating High-Tc SQUIDs in an Unshielded Environment." Preprint #96:046; submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 743-8201; e-mail preprints@www.tcs.uh.edu.
A. Tsukamoto, K. Nakanishi, H. Yamauchi, and K. Tanabe, "Nd Doped Ba3Cu3Oy Thin Films." To be published in Physica C (in press). Superconductivity Research Laboratory, International Superconductivity Technology Center (ISTEC), 10-13 Shinonome 1-chome, Koto-ku, Tokyo 135, JAPAN; telephone +81 3 3536-5703 through -5705; telefax +81 3 3536-5714 or -5717.
Shin-Ichi Uchida, "Optical Conductivity Studies of High-Tc Superconductors." Presented at the muSR 96 Conf., Nikko, Japan, April 15-19, 1996. Department of Superconductivity, University of Tokyo, Yayoi 2-11-16, Bunkyo-ku, Tokyo 113, JAPAN.
Shin-Ichi Uchida, K. Tamasaku, and S. Tajima, "c-Axis Optical Spectra and Charge Dynamics in La2-xSrxCuO4." To be published in Phys. Rev. B, Vol. 53, No. 21, June 1, 1996. Department of Superconductivity, University of Tokyo, Yayoi 2-11-16, Bunkyo-ku, Tokyo 113, JAPAN. 74.25.Fy; 74.25.Gz; 74.72.Dn.
R. Usami, S. Adachi, M. Itoh, T. Tatsuki, A. Tokiwa-Yamamoto, and K. Tanabe, "Synthesis of HgBa2Ca3Cu4Oy Under Ambient Pressure." To be published in Physica C (in press). Superconductivity Research Laboratory, ISTEC, 10-13 Shinonome 1-chome, Koto-ku, Tokyo 135, JAPAN.
A. A. Valladares, S. Fujita, M. de Llano, and M. A. Solis, "TF-Scaled Superconductivity in a Fermion-Quasiboson Mixture with Bose-Einstein Condensation." To be published in the Proc. of the XXI Int. Conf. on Low Temperature Physics (LT21), Prague, Czech Republic, Aug. 8-14, 1996. Contact M. A. Solis, Instituto de Fisica, UNAM, Apdo. Postal 20-364, 01000 Mexico D.F., MEXICO; e-mail masa@ifunam.ifisicacu.unam.mx.
N. V. Vo, S. X. Dou, and H. K. Liu, "Development of Bi(Pb)-2223/Ag Pancake-Shaped and Solenoidal Coils." Submitted to IEEE Trans. Magn. Centre for Superconducting and Electronic Materials, Institute of Materials Technology and Manufacturing, University of Wollongong, Northfields Ave., Wollongong NSW 2522, AUSTRALIA.
C. A. Wang, Z. F. Ren, J. H. Wang, D. K. Petrov, M. J. Naughton, W. Y. Yu, and A. Petrou, "Superconducting Epitaxial Tl2Ba2CuO6+d Thin Films on SrTiO3 with Tetragonal Lattice and Continuously Adjustable Critical Temperature." To be published in Physica C (in press). Superconductive Materials Laboratory, National Sciences and Mathematics Complex, State University of New York, Buffalo, NY 14260-3000; telefax (716) 645-6949.
Roy Weinstein, Yanru Ren, Jianxiong Liu, Ravi Sawh, Drew Parks, Charles Foster, and Victor Obot, "Permanent High Field Magnets of High Temperature Superconductor." Presented at the Int. Workshop on High Magnetic Fields: Industry, Materials, and Technology, Tallahasse, FL, Feb. 1996. Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 743-8201; e-mail preprints@www.tcs.uh.edu.
H. H. Wen, Z. X. Zhao, R. L. Wang, H. C. Li, and B. Yin, "Evidence for the Lattice-Mismatch-Stress-Field Induced Flux Pinning in (Gd1xYx)Ba2Cu3O7-d Thin Films." To be published in Physica C (in press). National Laboratory for Superconductivity, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080, PEOPLE'S REPUBLIC OF CHINA; telefax +86 10 256 8834; e-mail hhwen@aphy01.iphy.ac.cn.
J. Wosik, K. Nesteruk, L. M. Xie, X. P. Zhang, P. Gierlowski, C. Jiao, and J. H. Miller, Jr., "Enhanced-Resolution Magnetic Resonance Imaging Using High-Tc Superconducting rf Receiver Coils." Preprint #96:043; submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 7438201; e-mail preprints@www.tcs.uh.edu.
J. Wosik, L. M. Xie, D. Li, P. Gierlowski, J. H. Miller, Jr., and S. A. Long, "Investigation of the Microwave Power Handling Capabilities of High-Tc Superconducting Thin Films." Preprint #96:044; submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 743-8201; e-mail preprints@www.tcs.uh.edu.
Y. Y. Xue, R. L. Meng, Q. M. Lin, B. R. Hickey, Y. Y. Sun, and C. W. Chu, "Phase Stability and Defects of HgBa2Ca2Cu3O8+d." Preprint #96:052; submitted to the Proc. of the 10th Anniv. HTS Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996 (World Sci., Singapore). Texas Center for Superconductivity, University of Houston, Houston, TX 77204-5932; telephone (713) 743-8200; telefax (713) 743-8201; e-mail preprints@www.tcs.uh.edu.
P. S. Yadav, Sudhir Kumar, Savitri Agrawal, and Bal K. Agrawal, "Van Hove Singularities in the Parent Superconductor Ca1-xSrxCuO2." To be published in Physica C, Vol. 260 (in press). Contact Savitri Agrawal, Department of Physics, Allahabad University, Allahabad 211 002, INDIA.
F. Yakhou, V. Plakhty, A. Stratilatov, P. Burlet, J. P. Lauriat, E. Elkaim, J. Y. Henry, M. Vlasov, and S. Moshkin, "The 2sqrt[2a_0] x sqrt[2b_0] x c0 Herringbone Phase of YBa2Cu3O6+x: No Oxygen Ordering but an Alien Oxide, BaCu3O4." To be published in Physica C, Vol. 260 (in press). Departement de Recherche Fondamentale sur la Matiere Condensee, SPSMS/MDN, CEA-Grenoble, F-38054 Grenoble Cedex, FRANCE.
H. Yamauchi and M. Karppinen, "Classification of HTCS Cuprates, and Design and Synthesis of the Members of Novel Homologous Series." To be published in the Proc. of the 7th US-Japan Workshop on High-Tc Supercond., Tsukuba, Japan, Oct. 24-25, 1995 (in press). Center for Ceramics Research, Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, JAPAN; telephone +81 45 924 5315; telefax +81 45 921 6953; e-mail yamauchi@materia.titech.ac.jp.
H. Yamauchi, M. Karppinen, and S. Tanaka, "Homologous Series of Layered Cuprates." Presented at the Int. Conf. on Frontiers of High-Tc Supercond. (FHTSC), Morioka, Iwate, Japan, Oct. 27-29, 1995; to be published in Physica C (in press). Center for Ceramics Research, Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226, JAPAN; telephone +81 45 924 5315; telefax +81 45 921 6953; e-mail yamauchi@materia.titech.ac.jp.
Y. Yan, J. E. Evetts, B. Soylu, and W. M. Stobbs, "The Origins of High Values of the Critical Current Density in the Bi2Sr2Can-1CunOx System: High-Tc Superconducting Pathways at Low Angle Tilt Boundaries." To be published in Physica C, Vol. 260 (in press). IRC in Superconductivity, Cambridge University, Madingley Road, Cambridge CB3 0HE, UNITED KINGDOM; telefax +44 223 337074.
A. G. Yashenkin, D. N. Aristov, and S. V. Maleyev, "Phonon Anomalies in Layered Superconductors with Unconventional Pairing." To be published in Physica C (in press). Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg 188350, RUSSIA; +7 812 71 31963; e-mail ayash@thd.pnpi.spb.ru.
X. Zhang, S. Y. Xu, and C. K. Ong, "Location of Excess Oxygen Atoms in HgBa2CaCu2O6+d." To be published in Physica C, Vol. 260 (in press). Department of Physics, National University of Singapore, Low Kent Ridge Road, Singapore 0511, REPUBLIC OF SINGAPORE; telefax +65 777 6126.
X.-M. Zhu, E. Braendstroem, and B. Sundqvist, "Observation of the Transverse Force on Moving Vortices in YBCO Films." Department of Experimental Physics, Umea University, S-901 87 Umea, SWEDEN. 74.60.-w.
F. Zuo and V. N. Kopylov, "Influence of Overdoping on Fishtail Magnetization in Single-Crystal Tl2Ba2CuO6+d." To be published in Physica C, Vol. 260 (in press). Department of Physics, University of Miami, Coral Gables, FL 33124.
Igor Zutic and Oriol T. Valls, "Nonlinear Transverse Magnetic Moment in Anisotropic Superconductors." School of Physics and Astronomy and Minnesota Superconductor Institute, University of Minnesota, Minneapolis, MN 55455-0149. 74.20.Hi; 74.25.Nf; 74.20.De.
*June 15 - 17, 1996: 1996 Electronic Structure Workshop, Hubert H. Humphrey Center, University of Minnesota, Minneapolis, MN. Representative topics will include: large-N methods, pseudopotentials, quantum Monte Carlo methods, methods for quantum molecular dynamics, basis-sets methods, real-space methods, parallel computing, densityfunctional theory, etc. Suggestions welcome. Poster session open to all attendees. Further information available at home page http://www.cems.umn.edu/~jrc/es96.html. Information also available from James R. Chelikowsky, Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue S.E., Minneapolis, MN 55455; email jrc@msi.umn.edu. Or contact Michael Olesen, Symposium Administrator, University of Minnesota, Supercomputer Institute, 1200 Washington Avenue South, Minneapolis, MN 55415; telephone (612) 624-1356; telefax (612) 624-9565; email olesen@msi.umn.edu.
*July 7 - 11, 1996: 5th World Congress on Superconductivity, Technical University of Budapest, Budapest, Hungary. Main topics include theory of superconductivity, physical properties, performance characterization, low- and high-temperature materials, persistent magnetic fields, fabrication methodology, wire fabrication, thin films, granular superconductors, SMES, C60-based superconductors, medical and device applications, space applications, accelerator technology, power and energy applications, and future R&D directions. Invited, contributed, and poster papers. Selected papers to be published in leading journal. Technical exhibition. Scientific correspondence to be addressed to one of the following: Istvan Vajda, Secretary, Technical University of Budapest, Department of Electrical Machines and Drives, Egry Jozsef utca 18., H-111 Budapest, Hungary; telephone +36 1 463-2961; telefax +36 1 463-3600; e-mail vajda@ntb.bme.hu; or Calvin Burnham, President, P.O. Box 27805, Houston, TX 77227-7805; telephone (713) 840-0888; telefax (713) 840-0104. For information on technical exhibition contact Nandor Goebl, Vas Gereben u. 27., H-1124 Budapest, Hungary; telephone +36 1 463-2961; telefax +36 1 463-3600; e-mail vajda@ntb.bme.hu.
*Aug. 2 - 6, 1996: International Conference on Physics and Chemistry of Molecular and Oxide Superconductors (MOS'96), Karlsruhe, Germany. Satellite to the LT 21 conf. to be held in Prague, Czech Republic, Aug. 8-14, 1996. MOS'96 is a successor to similar conferences held in Eugene, OR (1993) and Cambridge, U.K. (1990). Topics will include fundamental properties of molecular and oxide superconductors such as cuprate and related compounds, organic superconductors, fullerenes, and borocarbides; normal-state properties; mechanism and theory of superconductivity; synthesis and processing; and new superconducting compounds. Proceedings will be published as a special volume of J. Low Temp. Phys. Program chair: H. Rietschel. Early registration deadline, June 1, 1996. For further information, contact Mrs. E. Maass, MOS'96 Conference Secretary, Institut fuer Nukleare Festkoerperphysik, Forschungszentrum Karlsruhe, Postfach 3640, D-76021 Karlsruhe, Germany; telephone +49 7247 822421; telefax +49 7247 824624.
Oct. 21 - 24, 1996: 9th International Symposium on Superconductivity (ISS'96), Sapporo, Hokkaido, Japan. Organized by the International Superconductivity Technology Center (ISTEC). Symposium will consist of oral and poster sessions and invited talks in the following fields of superconductivity: physics -- theory, physical properties, and new measurement techniques; chemistry -- new materials and syntheses, substitution, solid-state chemistry, and properties; flux pinning -- mechanism and electromagnetic properties of fluxoids; wires, tapes, and bulk -- solid-state powder ceramics, chemical-solution processing, melting solidification, and chemical-vapor deposition; thin films -- processing, properties, and lithography; device applications -- digital, analog, SQUID, and other electronic devices; system applications -- power, power transportation, magnets, magnetic shields, and other system applications. Papers are solicited. Abstract deadline, June 30, 1996. Papers will be published. Official language is English. For further information, contact ISS'96 Secretariat, ISTEC, Eishin Kaihatsu Bldg. 6F, 34-3 Shimbashi 5-chome, Minato-ku, Tokyo 105, Japan, telephone +81 3 3431-4002; telefax +81 3 3431-4044; e-mail chyoki@istec.mxa.meshnet.or.jp.
*Nov. 12 - 15, 1996: 41st Annual Conference on Magnetism & Magnetic Materials, Atlanta Hilton Towers, Atlanta, GA. Sponsored jointly by the American Institute of Physics and the Magnetics Society of the IEEE. Call for papers. Conference will include all areas of basic and applied science and technology related to magnetism. Technical subject categories will include fundamental properties and cooperative phenomena, transport properties, computational magnetics and imaging, soft magnetic materials and applications, hard magnetic materials and applications, artificially structured materials, other magnetic materials, magnetic recording, applications, and interdisciplinary topics. Abstract deadline, May 29, 1996. Proceedings to be published in a special issue of J. Appl. Phys. Invited and contributed papers as well as an exhibition of services, equipment, and materials. For further information, contact Diane Suiters, Conference Coordinator, 655-15th St. N.W., Suite 300, Washington, DC 20005; telephone (202) 6395088; telefax (202) 347-6109; e-mail magnetism@mcimail.com. (Preliminary program and general Conference information available after Sept. 15, 1996, at the URL address http://www.aip.org/edops/mmm96prog.html.)
July 27- Aug. 1, 1997: International Cryogenic Engineering Conference and the International Cryogenic Materials Conference (Joint ICMC-CEC 1997 Conference), Oregon Conventions Center, Portland, OR. Intended for those interested in cryogenic applications of engineering and materials. Includes a special focus on superconductivity (LTS and HTS). Cryo Expo will be held in conjunction with conference. For further information, contact Bill Warnes, Oregon State University, Mechanical Engineering Dept., Corvallis, OR 97331-6001; telephone (541) 737-7016; e-mail warnesw@engr.orst.edu; or Nancy Wilson, Exe-Me and Company, P.O. Box 25445, Portland, OR 97298-0445; telephone (503) 292-2114; e-mail ewemeco@europa.com. Information also available at the web site http://www.orst.edu/groups/icmc97.
New Book: Coherence in High Temperature Superconductors, edited by G. Deutscher and A. Revcolevschi. Presents the special problems posed by the strong anisotropy of the cuprates and reviews fluctuation effects, the properties of the vortex state, physics of tunneling (s- and d-wave superconductors), and properties of related junction devices. Preparation methods and advanced experiments on state-of-the-art single crystals and thin films are emphasized. Intended readership: chemists, physicists, and materials scientists. Publ. 1996; 500 pp.; price $118; ISBN 981-02-2650-0. Contact World Scientific Publishing Co. Inc., 1060 Main St., River Edge, NJ 07661; telephone (800) 227-7562 or (201) 4879655; telefax (201) 487-9656. In Europe, World Scientific Publishing Co. Ltd., 57 Shelton Street, Covent Garden, London WC2H 9HE, UK; telephone +44 171 836 0888; telefax +44 171 836 2020. In Asia, World Scientific Publishing Co. Pte. Ltd., Farrer Road, P.O. Box 128, Singapore 9128; telephone +65 3825663; telefax +65 3825919; telex RS 28561 WSPC; cable COSPUB. Information also available at the Web sites http://www.singnet.com.sg/~wspclib or http://www.wspc.co.uk.
Books: Compound and Josephson High Speed Devices, edited by Takahiko Misugi and Akahiro Shibatomi. This reference offers a review of Japanese progress in the development of high-speed analog and digital integrated circuits based on compound semiconductors and superconducting materials. Details of digital and analog LSI application of GaAs HBT, HEMT, and Josephson junction technologies, and explanations of bulk crystal-growth methods integral to the performance and quality of these devices are presented. Illustrated with many photographs, tables, and figures. Publ. 1993; 318 pp.; price $75; ISBN 0-306-44384-8.
Quantum Transport in Ultrasmall Devices, Vol. 342 in NATO ASI Series B: Physics, edited by David K. Ferry, Harold L. Grubin, Carlo Jacobini, and Anti-Pekka Jauho. Forty-four contributions explore the problem of quantum transport in ultra-small devices. Volume discusses both theoretical transport physics and experimental effects in mesoscopic devices. Topics covered include quantum confined systems (wells, wires, and dots); trajectories in quantum transport; two-dimensional dynamics of electrons passing through a point contact; conductance in quantum boxes (interference and single-electron effects); recent developments in quantum transport and mesoscopic structures and quantum wells; effects of band structure and electric fields on resonant tunneling dynamics; and quantum hydrodynamics (derivation and classical limit). Publ. 1995; 554 pp.; price $139.50; ISBN 0-306-44999-4.
Contact Plenum Publishing Corp., Attn: Dept. K27, 233 Spring Street, New York, NY 10013-1578; telephone (800) 221-9369; telefax (212) 8071047.
The information contained herein is intended for limited distribution. Readers are expected to respect the rights of the authors.
Please address all contributions and inquiries to: Dr. Sreeparna Mitra, A219 Physics, Ames Laboratory/Iowa State University, Ames, Iowa 50011-3020. Telephone: (515) 294-3877. Telefax: (515) 294-1134. Telex: 269266. E-mail: MITRA@AMESLAB.GOV or MITRA@IASTATE.EDU.
Project Director/Editor: Sreeparna Mitra
Science Editor: John R. Clem
High-Tc Update, Vol. 10, #10, May 15, 1996.