PLEASE NOTE: Issues of High-Tc Update from November 15, 1993, onward are also available in coded Word versions (BINHEX and RTF). (These versions preserve the Greek letters, special characters, accents, etc.) If you are interested in the alternate formats, contact the editor for information.
The High-Tc Update web page is located at the URL
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The following Nota Bene has been contributed by Matthew J. Kramer, adjunct assistant professor at ISU and associate scientist at the Ames Laboratory. Our science editor, John R. Clem, is currently on travel.
Scanning SQUID microscopy was used by J. Mannhart (IBM Zurich) et al. to directly image the magnetic flux in asymmetric 45 degrees [001] tilt boundaries in pulsed-laser deposited YBa2Cu3O7-d thin films. Magnetic flux is spontaneously generated in samples nominally zero-field-cooled to 4.2 K. Cross sections along the boundaries show that the flux is randomly distributed on the length scale of a few microns, which changes polarity and is not quantized. The positive and negative flux is produced by clockwise and counterclockwise current patterns produced as a consequence of pi-junctions on some facets and o-junctions on other facets. This has direct implications for fabricating gain-boundary junctions. In addition, the results of this experiment are consistent with d_[x^2-y^2] type symmetry to the order parameter.
A d_[x^2-y^2] symmetry for the order parameter in the a-b plane for untwinned YBa2Cu3O7-x single crystals, studied by using torque magnetometry, was reported in two papers by T. Ishida (Osaka Prefecture U.) et al. The crystals show both two-fold and four-fold symmetry in the a-b plane. The authors argue that the four-fold symmetry in the a-b torque curve is not consistent with dxy symmetry. This work is nicely complimented by a third paper by T. Ishida et al. on a twinned Y123 single crystal which demonstrates that vortices are pinned at twin boundaries.
A new alkaline-earth cuprate with a Tc of 50 K was reported by J. P. Hodges (Birmingham) et al. Sr0.08Ba1.2CuO3+d was synthesized at ambient pressure using traditional solid-state calcination of metal oxides and carbonates. Time-of-flight neutron diffraction was used to resolve the crystal structure, which is an oxygen-deficient La2CuO4-type structure with tetragonal symmetry [(a = 3.8988(3) Angstroms and c = 12.815(3) Angstroms]. Ordering of the oxygen vacancies was observed within the CuO2 planes. The absence of stoichiometric CuO2 planes is unique for the cuprate superconductors, and this material has implications for understanding the role of CuO2 planes in superconductivity.
Angle-resolved photoemision spectroscopy (ARPES) was used to measure the superconducting gap in single crystal Bi2212 and Y123 by H. Ding (Argonne) et al. Clean Bi2212 has a d-wave gap function with the form cos(kx)-cos(ky). Irradiated samples have low frequency tails to the leading edge. A reproducible gap in Y123 was reported for detwinned crystals with delta = .05 and a Tc of 90 K. The work by J. Tanaka (Kanagawa U.) reported that ARPES on Bi2212 and neutron scattering data for LSCO are best fitted to a pair potential which is neither d nor s wave, but is approximated by 2cos(x)-cos(y) and 2cos(y)-cos(x).
A theoretical basis for weak gravity shielding in levitating and rotating HTSC disks is discussed by G. Modanese (INFN). Weight reduction of 0.05% was noted for disks when levitating, but not rotating. This effect increases to 0.5% for disks rotating at 5000 rpm.
REBa2Cu3O7-d
High-quality biaxially textured Y-Ba-Cu-O thick tapes (< 9 m) with Jc of 0.9 x 10^6 A/cm^2 were reported by H. C. Freyhardt (Institut fuer Metallphysik) et al. using pulsed-laser deposition (PLD). A wide variety of shaped substrates (tapes, cylinders, and sheets) can be coated using PLD provided that a highly in-plane textured YSZ buffer layer can be applied using ion-beam-assisted deposition (IBAD). This has implications for fabricating complex shapes for such applications as magnetic shields and microwave cavities.
A major drawback to melt-texture processing of Y123 is its slow growth rate. K. Salama et al. (TCSUH) show that Nd1+xBa2-xCu3O7 can be meltprocessed nearly 50 times faster than Y123. Samples had Tc onsets of 93 K with Jc of 5000 A/cm^2 in self field at 77 K.
Magnetic fluctuations in single-crystal YBa2Cu3O7-d with a variety of oxygen concentrations were measured by M. A. Hubbard (University of Illinois) et al. using dc SQUID magnetometry. The fluctuations over the doping range of 0.7 < delta < 0.9 are consistent with the power-law behavior predicted by the 3D-XY model. The mass anisotropy increases almost linearly with decreasing Tc and correlates directly with the growth of the in-plane coherence length.
An upper limit to the increase in the Bose glass transition for Pbirradiated single crystals of Y123 was found to be significantly below H_[c2](T) by A. V. Samoilov (Ecole Polytechnique) et al. They present arguments that the B^[BG]_[max](T) line separates entangled and disentangled vortex liquids in virgin Y123.
Bi Cuprates
The activation energy for the formation of (Bi,Pb)2Sr2Ca2Cu3O10+d was found to be sensitive to heating rate, equilibration time, precursor particle size, calcination temperature, and nominal composition by J. C. Grivel and R. Fluekiger (Universite de Geneve). They note that published activation energies for well defined experimental conditions can be reproduced, if the pertinent information is available.
Two papers by W. Wong-Ng (NIST) investigate the phase equilibria in the Bi-Pb-Sr-Ca-Cu-O system and the sub-solidus phase relationships in the PbO-SrO-CaO system. XRD analysis indicates that there are a total of ten phases in equilibrium with the 2212 phase at 830^oC. Of those ten phases, seven are in equilibrium with Bi2223 at 845^oC.
Hg Cuprates
Highly oriented HgBa2Ca2Cu3O8+d on Ni tapes with a Tc of 130 K is reported by R. L. Meng et al. (TCSUH). Ni was used as a substrate because of its stability in Hg and O atmospheres. A buffer layer of first Cr and then Ag was sputtered to protect the Ni from the ceramic and provide adhesion of the precursor layer. The resulting tape had preferred c-axis alignment with small second-phase impurities. Transport Jc was 2.5x10^4 A/cm^2 at 77 K.
Tl Cuprates
The magnetic and thermal properties of the Tl-1223 phase were investigated by G. Triscone (U. California-La Jolla) et al. They report the upper critical field, thermodynamic critical field, lower critical field, penetration depth, Ginzburg-Landau parameter, and the mean-field specific-heat jump. Many of the properties are intermediate between quasi-3D Y123 and quasi-2D Bi2223 with no indication of d-wave superconductivity observed. (Tl,Pb)(Sr,Ba)2Ca2Cu3Oy single crystals were grown by self-flux method as reported by X. L. Wang (Atominstitut) et al. The Tc for the best crystals ranges from 105.2 K-111.2 K with transition widths of 3-6 K. Processing parameters for optimizing crystal growth are discussed.
Borocarbides
Measurements of the rf penetration depth L(T,H,T) was used by S. Oxx (Northeastern) et al. to study the superconducting order parameter, vortex dynamics in the mixed state, and delineate critical fields in YNi2B2C. The lower critical field was found to have an anomalous T dependence and is consistent with earlier superfluid density measurements at microwave frequencies. The vortex response is dominated by viscous flux flow due to weak pinning. The angular dependence of the vortex contribution is in good agreement with the Coffey-Clem model.
The thermal expansion of YNi2B2C by high-temperature x-ray diffraction is reported by M. Buchgeister and W. Pitschke (Institut fur Festkoerperund Werkstofforschung). The thermal expansion for the in-plane direction is nearly an order of magnitude larger than the c axis.
Other Materials
The Tc of the CyCu1-yBa2Cu3O8+d (y = 0.5) synthesized under 8 GPa confining pressure was raised from 67 K to 120 K as reported by C. Chaillout (Laboratorie de Cristallographie) et al. This Tc is higher than that reported for the n = 4 layer member. Tc could be changed by altering the C content.
The dependence of Tc and lattice parameter for Rb3C60 under high hydrostatic pressure was determined by J. Diederichs (Washington U.) et al. The equation of state was determined to 1 GPa at 14 K and 295 K using high-pressure neutron diffraction. The Tc as a function of the lattice parameter does not follow a universal curve in high pressure and substitution experiments as previously claimed.
A new superconducting fulleride, (NaH)4C60, with a lattice parameter of 14.365(3) was reported by K. Imaeda et al. (Institute for Molecular Science, Myodaiji). dc SQUID magnetization was used to determine Tc (15 K) and the superconducting fraction (65%). Mass desorption was used to confirm that the hydrogen exists in the sample as a hydride ion.
Thin Films
The temperature dependence of the critical current and the normal-state resistance for eight different Tl2Ba2CaCu2O8 bicrystals was reported by B. D. Weaver and E. M. Jackson (Naval Research Laboratory). The temperature dependence of I_c and R_n show that the bicrystals behave like SIS junctions even though Tl2223 bicrystals act like SNINS junctions. They report that these junctions are robust with respect to time, thermal cycling, and vacuum exposure.
The effect of electron irradiation on Tc suppression in Y123 films was studied by S. K. Tolpygo (SUNY Stony Brook) et al. The displacement energy for oxygen in the CuO2 plane was determined to be 8.4 eV for irradiation along the c-axis. The upper limit for displacement of the chain-site oxygen was 2.8 eV. In a complimentary paper, the authors further analyzed the influence of in-plane oxygen defects in Zn- and Prdoped Y123 and irradiated Bi2201 and Bi2212. They show that the Tc suppression is qualitatively consistent with the pair-breaking theory for d-wave superconductivity, but that the pair-breaking scattering rate is three times less than the transport impurity scattering rate derived from transport data.
Radiation damage in the n-doped Nd2-xCexCuO4+y (NCCO) thin films by 4MeV alpha particles was investigated by B. D. Weaver (NRL) et al. The sensitivity to radiation damage in NCCO was found to be qualitatively similar to Y123 and the mechanism of Tc reduction appears symmetric with respect to carrier type.
Thin films of Nd123 were successfully fabricated by off-axis rf sputtering by I. Kim et al. (Korea Research Institute of Standards and Science). X-ray diffraction showed that the films were highly c-axis oriented without any impurity phases. Tc (R=0) was 87 K. Jc of pattered films were > 10^6 A/cm^2 at 10 K, but dropped below this value for T > 50 K.
Applications
Realizing HTSC for applications such as magnetic bearing for flywheel energy storage are hampered by dynamic instabilities, T. Hikihara (Kansai U.) et al. discuss a 1-D levitation model for HTSC-permanent magnet system. The force-displacement hysteresis is shown to mimic the magnetization-field hysteresis so that external disturbances to the levitation system will induce energy loss via the magnetic hysteresis in the HTSC bearing.
Recent progress in developing high-Tc bolometric and non-bolometric devices is reported by A. J. Kreisler (U. Paris) et al. Several examples of broadband bolometric devices and non-bolometric infrared detectors are discussed.
Based on the discovery of photoconductivity due to anomalies in insulators coupled to ceramic superconductors, T. Masumi and M. Isobe (Gunma U.) propose the development of superconducting optoelectronic devices which should be capable of switching in the nanosecond time frame.
Theory
A generalized formula for Josephon current in d-wave/I/d-wave junctions, which includes a spatial dependence on the pair potential and zeroenergy states formed around the interfaces, was presented by Y. Tanaka (Ikarashi) et al. For a fixed-phase difference between two superconductors, the current component becomes either positive or negative depending on the injection angle of the quasiparticle.
The slope of the upper critical field |dH_[c2]/dT|Tc in superconductors with d-wave pairing was shown to rapidly decrease with a normal concentration of impurities, while a superconductor with anisotropic swave pairing shows an increase in the slope as reported by A. I. Posazhennikova and M. V. Sadovskii (Ekaterinburg). However, the nonlinearity in the temperature dependence in high-Tc oxides complicates the application of these results.
The role of coupling between the CuO chains and CuO2 planes in Y123 is discussed by W. A. Atkinson and J. P. Carbotte (McMaster). The interlayer pairing interaction is shown to have s-wave symmetry which overwhelms the intrinsic d-wave gap in the planes when the interlayer interaction is large.
Overviews
An overview on spin fluctuation and pairing in cuprate superconductors is given by D. Pines (U. Illinois). The development of antiferromagnetic Fermi-liquid description of the normal-state behavior on three key issues of superconductivity are discussed: the physical characteristics and origin of anomalous spin and charge behavior in the normal state, the mechanism for high-temperature superconductivity, and the superconducting pairing state.
An overview on local density-of-state calculations for vortex lattices in type-II superconductors is presented by U. Klein and B. Pottinger (U. Linz). Chapters include quasiclassical equations for single vortex, vortex lattice, and applications to high-Tc superconductors.
Ph.D. Theses
The role of inequivalent CuO2 layers in Tl- and Hg-based hightemperature superconductors was the topic of the dissertation by D. T. Jover (U. Amsterdam). A cryogenic diamond anvil cell was used to measure the pressure dependence of Tc for up to 21 GPa for Tl-2223 and Tl-2234 and up to 30 GPa for Hg-1223 and Hg-1234 compounds.
The dynamics of flux penetration in Y123 cylinders was the subject of H. F. Castro's (U. Lausanne) dissertation. The effects of magnetic field amplitude, temperature, a superposed dc field, silver doping, and pressure on the intrinsic properties of the sample were studied. The author also proposes a theoretical model based on flux flow to describe transient phenomena and based on his results, concludes that when a small field is suddenly applied to an HTSC ceramic, vortices penetrate the sample through the weak links avoiding the grains.
Contributed by Matthew J. Kramer
High-Tc Update is available without charge to interested persons. Recipients are expected to participate in this information exchange by sending us preprints, reprints, meeting news, research news, etc. Contributions to defray the cost of newsletter printing and mailing are welcome.
This section describes progress in manufacturing, product development, and technology transfer in the high-Tc superconductivity field. Please send your contributions (product development information, news regarding technology transfer efforts, or any information you would like to share about your corporation or laboratory) to the editor.
Development of a world-record length HTS assembly high-voltage cable was announced by Pirelli and the Electric Power Research Institute (EPRI) as part of an industry/government partnership. The assembly was developed under a partnership among Pirelli, EPRI, American Superconductor Corporation (ASC), and the USDOE Superconductivity Partnership Initiative (SPI). A 50-m flexible conductor was fabricated using industrial equipment at Pirelli's facility in Lexington, South Carolina, signaling the beginning of the industrial phase of superconducting cables. Completion of the cable assembly was heralded as a significant development at the 10th Anniversary HTS Workshop on Physics, Materials, and Applications in Houston, Texas. Testing of the 50-meter flexible assembly, after repeated rewinding operations, showed a dc critical current of 1,800 A at 1 microvolts/cm at 77 K. The assembly consists of a flexible core wrapped with several layers of HTS tape, and will be completed at a later date with cryogenic and electrical insulation and pressurized liquid N flow through the core to cool the superconducting tapes. HTS tapes totaling a length of 6000 m were developed and supplied by ASC, part of which was cabled in layers to form the flexible conductor assembly. Company executives say that the significant HTS achievement indicates that practical realization of this technology is within the reach of electric power industries, and the excellent performance of the cable conductor implies that utilities are a step closer to realizing the benefits of HTS technology. For further information, contact Roger Adams, Pirelli, 700 Industrial Drive, Lexington, SC 29072-3799; telephone (803) 951-4992. Or contact Lori Telson, Electric Power Research Institute (EPRI), 3412 Hillview Avenue, Palo Alto, CA 94304; telephone (415) 855-2272.
A key benchmark toward commercializing HTS motors was achieved by the demonstration of a 200-hp electric motor by Reliance Electric and American Superconductor Corp. The motor demonstration represents an output power of 60% greater than the original design output of 125 hp. The companies also announced that negotiations are under way for the next phase of a $21 million HTS motor development program under the USDOE Superconductivity Partnership Initiative. The motor, designed, built, and tested by Reliance using HTS rotor coils that were fabricated by American Superconductor Corp., was operated at 1,800 rpm with the HTS coils at a temperature of 24 K. Company spokespersons state that the demonstration sets the stage for continued development of commercialscale HTS motors. Goals for the phase II program are a 1,000-hp motor demonstration and a 5,000-hp pre-commercial prototype demonstration. For further information, contact American Superconductor Corporation, Two Technology Drive, Westborough, MA 01581; telephone (508) 836-4200; telefax (508) 836-4248.
A consortium led by the Industrial Company Metal Manufacturers Ltd. (MM) has announced the launch of a $6 million R&D project aimed at transferring laboratory-scale research on superconductivity tape at the University of Wollongong to a commercial-scale pilot plant. Other partners involved are the Energy Research and Development Corp. (ERDC); the Federal Govt. Dept. of Industry, Science, and Technology; the Australian Electricity Supply Industry Research Board; the University of Wollongong; and CSIRO. MM's interest will be the application of the tape to transmission and distribution cables, in particular for the electricity supply industry. Applications in motors, generators, and transformer windings will also be explored. For further information, contact Alan Arnold, Group Technical Manager, MM Cables-Energy Products, 1 Heathcore Rd., Liverpool, NSW 2170, AUSTRALIA; telephone +61 2 600 0967; telefax +61 2 600 0876.
The joint research and development program between American Superconductor Corp. (ASC) and Inco Alloys International has been extended for three years, to continue work on advanced commercial generations of HTS wire based on ASC's proprietary "metallic precursor" process. ASC expects to receive about $3.3 million in funding from Inco over the course of the extended agreement. Metallic precursors are the building blocks for a manufacturing process licensed exclusively by ASC from MIT. ASC and Inco Alloys have been developing metallic precursors using a Ni-based alloying technology pioneered by Inco Alloys and successfully used in the aerospace industry. For further information, contact Denise Mikulis, American Superconductor Corporation, Two Technology Drive, Westborough, MA 01581; telephone (508) 836-4200; telefax (508) 836-4248.
Contributed by Sreeparna Mitra
A. Agliola Gallitto and M. Li Vigni, "Nonlinear Effects and Anisotropy in YBa2Cu3O7 Single Crystals Near Tc." To be published in Physica C (in press). INFM and Istituto di Fisica dell'Universita, Via Archirafi 36, I-90123 Palermo, ITALY. Key words: high-temperature superconductors, electromagnetic field response, critical fields and anisotropy.
Bekir Aktas and Hueseyin Zafer Durusoy, "A New Technique for Measuring the Microwave Penetration Depth in High-Tc Superconducting Thin Films." To be published in Physica C, Vol. 259 (in press). Department of Physics, Gebze Institute of Advanced Technology, 41400 Kocaeli, TURKEY. Key words: high-Tc superconductivity, penetration depth, ESR.
B. Andrzewski, B. Czyzak, J. Stankowski, and L. Kevan, "MMMA: A Powerful Method for Investigating of High-Temperature Superconductors." Submitted to Appl. Supercond. Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17/19, PL-60179, Poznan, POLAND; telephone +48 61 612-300; telefax +48 61 684-524; e-mail and@ifmpan.poznan.pl.
M. Aprili, J. Lesueur, W. A. Quinton, and L. Dumoulin, "Evidence for an Enhanced Paracoherence Regime in YBCO Ultra-Thin Films." Submitted to Physica C, Feb. 1996. Department of Physics, Loomis Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801; J. Lesueur's e-mail in Paris, France lesueur@csn-hp.in2p3.fr. 74.25.Fy; 74.40.+k; 74.76.Bz; 74.80.Bj.
M. Aprili, J. Lesueur, W. A. Quinton, and L. Dumoulin, "LongRange Phase Coherence in YBCO Ultra-Thin Films." Presented at the SPIE Photonics West '96 Conf., San Jose, CA, Jan. 27-Feb. 2, 1996; to be published in Oxide Superconductors: Physics and Nanoengineering II, edited by D. Pavuna and I. Bozovic (SPIE, Bellingham, 1996). Department of Physics, Loomis Laboratory, University of Illinois at UrbanaChampaign, Urbana, IL 61801; J. Lesueur's e-mail in Paris, France lesueur@csn-hp.in2p3.fr. Key words: high-Tc superconductors, fluctuations, paraconductivity, paracoherence, thin films, disorder.
C. L. Ash, D. C. Harris, S. E. Hebboul, J. C. Garland, and C. C. Almasan, "The dc Magnetization of Random YBa2Cu3O7-d/Ag Bulk Composites." Department of Physics, Ohio State University, Columbus, OH 43210.
V. D. Ashkenazy, M. Bonaldi, G. Jung, B. Ya. Shapiro, and S. Vitale, "Non-Monotonic High Frequency Flux-Flow Noise Spectra in HighTc Superconductors." To be published in Solid State Commun. Department of Physics, Bar-Ilan University, 52100 Ramat Gan, ISRAEL; B. Ya. Shapiro's telephone +972 3 531 8980; telefax +972 3 535 3298; e-mail f67410@barilvm.bitnet. Key words: high-Tc superconductors, thin films, noise, flux pinning and creep.
W. A. Atkinson and J. P. Carbotte, "Chain-Plane Coupling in YBa2Cu3O7." To be published in Spectroscopic Studies of Superconductors, edited by I. Bozovic and D. van der Marel (SPIE, Bellingham, 1996). Department of Physics and Astronomy and the Canadian Institute for Advanced Research, McMaster University, Hamilton, Ontario L8S 4M1, CANADA. Key words: high-Tc superconductivity, YBa2Cu3O7, chains, penetration depth, models of superconductivity, pairing symmetry, d wave.
F. Bass, V. D. Freilikher, B. Ya. Shapiro, and M. Shvartser, "Effect of the Surface Roughness on Bean-Livingston Surface Barrier." To be published in Physica C. Jack and Pearl Resnick Institute of Advanced Technology and Institute of Superconductivity, Department of Physics, Bar-Ilan University, 52100 Ramat Gan, ISRAEL; B. Ya. Shapiro's telephone +972 3 531 8980; telefax +972 3 535 3298; e-mail f67410@barilvm.bitnet. 74.60.Ec.
V. Berseth, A. I. Buzdin, M. V. Indenbom, and W. Benoit, "Peculiarities of Field Penetration in the Presence of Cross-Flux Interaction." To be published in Physica C. Institut de Genie Atomique, Departement de Physique, Ecole Polytechnique Federale de Lausanne, Ecublens, CH-1015 Lausanne, SWITZERLAND; telephone +41 21 693 4498; telefax +41 21 693 4470; e-mail vincent.berseth@iga.dp.epfl.ch. Key words: anisotropic superconductor, combined flux lattice, criticalstate model.
G. Blumberg, P. Abbamonte, and M. V. Klein, "Magnetic Raman Scattering in Cuprate Antiferromagnetic Insulators and Doped Superconductors." To be published in Spectroscopic Studies of Superconductors, edited by I. Bozovic and D. van der Marel (SPIE, Bellingham, 1996). NSF Science and Technology Center for Superconductivity and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801-3080; e-mail girsh_blumberg@stcs.mrl.uiuc.edu. Key words: magnetic Raman scattering, antiferromagnetic insulators, high-Tc cuprates.
V. Boffa, T. Petrisor, L. Ciontea, U. Gambardella, and S. Barbanera, "Properties of In-Situ Laser-Pulsed Deposited YBCO Thin Films on MgO with SrTiO3 Buffer Layer." To be published in Physica C, Vol. 259 (in press). ENEA Centro Ricerche Frascati, Via E. Fermi 27, Frascati, I-00044 Rome, ITALY; telefax +39 6 9400 5400; e-mail boffa@frascati.enea.it. Key words: YBCO thin film, buffer layer, electrical resistivity, critical current density.
Y. Bruynseraede, V. V. Metlushko, K. Temst, M. Baert, E. Rosseel, M. J. Van Bael, and V. V. Moshchalkov, "Confinement of the Flux Line Lattice in Nanostructured Superconducting Films and Multilayers." To be published in Oxide Superconductors: Physics and Nanoengineering II, edited by D. Pavuna and I. Bozovic (SPIE, Bellingham, 1996). Laboratorium voor Vaste-Stoffysika en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, B-3001 Leuven, BELGIUM. Key words: multilayers, nanostructures, pinning, flux motion.
M. Buchgeister, G. Fuchs, and J. Zawadzki, "Influence of Co Doping on Structure and Critical Temperature of Y(Ni1-xCox)2B2C and Lu(Ni1-xCox)2B2C." To be published in Mater. Lett. Contact G. Fuchs, Institut fuer Festkoerper- und Werkstofforschung Dresden e.V., Postfach 270016, D-01171 Dresden, GERMANY; telefax +49 351 4659-313; e-mail markus.buchgeister@uni-tuebingen.de. 74.70.-b; 74.70.Ad.
M. Buchgeister and W. Pitschke, "High Temperature X-ray Diffraction Phase Analysis of YNi2B2C." Submitted to Physica C. Contact W. Pitschke, Institut fuer Festkoerper- und Werkstofforschung Dresden e.V., Postfach 270016, D-01171 Dresden, GERMANY; telefax +49 351 4659-313; email markus.buchgeister@uni-tuebingen.de. 64.70.-p; 65.70.+y; 74.70.-b; 74.70.Ad.
G. Carapella, G. Costabile, R. De Luca, S. Pace, A. Polcari, and C. Soriano, "Josephson Equations for the Simplest Superconducting Multilayer System." To be published in Physica C, Vol. 333 (in press). Contact R. De Luca, INFM Research Unit and Department of Physics, University of Salerno, I-84081 Baronissi (SA), ITALY; telefax +39 89 95 3805; e-mail deluca@vaxsa.csied.unisa.it. Key words: Josephson junctions, multilayered structures, Josephson effect. 74.50.+r.
Hector F. Castro, "Dynamics of Magnetic Field Penetration in High Temperature Superconductors." Submitted as a Ph.D. thesis (Dept. of Physics, Universite de Lausanne, Switzerland, Nov. 10, 1995). Institut de Physique Experimentale, Universite de Lausanne, CH 1015 Lausanne, SWITZERLAND; telephone +41 21 6923 624 or -70; telefax +41 21 6923 605; e-mail hcastro@ulys.unil.ch.
C. Chaillout, S. Le Floch, E. Gautier, P. Bordet, C. Acha, Y. Feng, A. Sulpice, J. L. Tholence, and M. Marezio, "Enhancement of Tc of CyCu1-yBa2Ca2Cu3Ox from 67 K to 120 K by Reduction Treatments." To be published in Physica C. Laboratoire de Cristallographie, CNRSUJF, BP 166, 25 Avenue des Martyrs, F-38042 Grenoble Cedex 9, FRANCE; telephone +33 76 88 78 00; telefax +33 76 88 10 38.
John R. Clem, Maamar Benkraouda, and Thomas Pe, "Pancake Vortices in High-Temperature Superconducting Thin Films." Presented at the 10th Anniv. Workshop on Phys., Mater., and Appl., Houston, TX, March 12-16, 1996; (Proc. to be published by World Sci., Singapore). Ames Laboratory-USDOE and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011-3020; telephone (515) 294-4223; e-mail clem@ameslab.gov.
G. D'Anna, P. L. Gammel, A. P. Ramirez, U. Yaron, C. S. Oglesby, E. Bucher, and D. J. Bishop, "Evidence of Surface Superconductivity in 2H-NbSe2 Single Crystals." Submitted to Phys. Rev. Lett., Feb. 26, 1996. Bell Laboratories, Lucent Technologies, Murray Hill, NJ 07974; e-mail danna@physics.att.com. 74.60.Ge.
M. P. Das and L. J. Tassie, "A Possible New Type of Superconductivity." Submitted to Mod. Phys. Lett. B. Department of Theoretical Physics, Research School of Physical Sciences and Engineering, The Australian National University, Canberra, ACT 0200, AUSTRALIA. 74.20; 11.71.
Udayan De, P.M.G. Nambissan, and Dirtha Sanyal, "Investigation of Superconducting Transition by Positron Annihilation and In-Situ Resistance Measurements: The 10 K-300 K Cryogenic Set-Up and Results." Presented at the 14th National Symp. on Cryogenics, Aurangabad, India, May 18-20, 1995. Variable Energy Cyclotron Centre, 1/AF Bidhannagar, Calcutta 700 064, INDIA.
T. P. Devereaux, A. Virosztek, and A. Zawadowski, "Multiband Electronic Raman Scattering in Bilayer Superconductors." Department of Physics, University of California, Davis, CA 95616; e-mail tpd@onsager.ucdavis.edu. 74.20.Mn; 74.60.Ge; 64.60.Ak; 74.40.+k.
J. Diederichs, J. S. Schilling, K. W. Herwig, and W. B. Yelon, "Dependence of the Superconducting Transition Temperature and Lattice Parameter on Hydrostatic Pressure for Rb3C60." Submitted to J. Phys. Chem. Solids, March 1, 1996. Contact J. S. Schilling, Department of Physics, Washington University, Campus Box 1105, One Brookings Drive, St. Louis, MO 63130; e-mail schill@howdy.wustl.edu.
H. Ding, M. R. Norman, J. C. Campuzano, M. Randeria, A. F. Bellman, T. Yokoya, T. Takahashi, T. Mochiku, and K. Kadowaki, "ARPES Study of the Superconducting Gap Anisotropy in Bi2Sr2CaCu2O8+x." Materials Science Divison, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439. 74.25.-q; 74.72.Hs; 79.60.Bm.
H. Ding, M. R. Norman, J. Giapintzakis, J. C. Campuzano, H. Claus, H. Wuehl, M. Randeria, A. Bellman, T. Yokoya, T. Takahashi, T. Mochiku, K. Kadowaki, and D. M. Ginsberg, "ARPES Studies of the Superconducting Gap in High Temperature Superconductors." To be published in Spectroscopic Studies of Superconductors, edited by I. Bozovic and D. van der Marel (SPIE, Bellingham, 1996). Materials Science Divison, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439. Key words: high-temperature superconductors, superconducting gap, pairing symmetry, angle-resolved photoemission.
H. C. Freyhardt, J. Dzick, K. Heinemann, J. Hoffmann, J. Wiesmann, F. Garcia-Moreno, S. Sievers, and A. Usoskin, "Biaxially Textured YBaCuO Thick Films on Technical Substrates." Presented at the 10th Anniv. Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996; (Proc. to be published by World Sci., Singapore). Institut fuer Metallphysik, LMM/KL, Universitaet Goettingen, Windausweg 2, D-37073 Goettingen, GERMANY.
A. V. Galaktionov, "Superconductivity Stimulation in Anisotropic Superconductors." To be published in Physica C, Vol. 259 (in press). I. E. Tamm Department of Theoretical Physics, P. N. Lebedev Physics Institute, Leninsky Prospect 53, Moscow 117924, RUSSIA. Key words: dwave superconductor, thin films, microwave absorption.
V. A. Gasparov, I. E. Batov, Qi Li, and C. Kwon, "Observation of Berezinski-Kosterlitz-Thouless Transition in PrYBaCuO/YBaCuO/PrYBaCuO Trilayers." To be published in Oxide Superconductors: Physics and Nanoengineering II, edited by D. Pavuna and I. Bozovic (SPIE, Bellingham, 1996). Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Moscow District, RUSSIA.
Gurami Gogadze, "Model of Non-Josephson Oscillations in the Resistive State of Superconducting Films." To be published in Spectroscopic Studies of Superconductors, edited by I. Bozovic and D. van der Marel (SPIE, Bellingham, 1996). B. I. Verkin Institute for Low Temperature Physics and Engineering, National Academy of Sciences of Ukraine, Kharkov 310164, UKRAINE. Key words: resistive state, phase slip center, Andreev reflection, quasiparticle scattering (the bremsstrahlung effect).
J.-C. Grivel and R. Fluekiger, "Factors Influencing the Apparent Activation Energy for the Formation of the (Bi,Pb)2Sr2Ca2Cu3O10+d Compound." To be published in J. Alloys and Compounds. Departement de Physique de la Matiere Condensee, Universite de Geneve, 24 quai ErnestAnsermet, CH-1211 Geneve 4, SWITZERLAND; telephone +41 22 702 61 11; telefax +41 22 702 68 69. Key words: Bi-Pb-Sr-Ca-Cu-O system, activation energy, phase formation.
R. Hackl, G. Krug, R. Nemetschek, M. Opel, and B. Stadlober, "Electronic Raman Scattering in Copper-Oxide Superconductors and Related Compounds." To be published in Spectroscopic Studies of Superconductors, edited by I. Bozovic and D. van der Marel (SPIE, Bellingham, 1996). Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meissner-Strasse 8, D-85748 Garching, GERMANY. Key words: Raman scattering, cuprate superconductors, anisotropy, unconventional gaps.
E. B. Harris and J. C. Garland, "Voltage Splay Modes in a Modified Linear Josephson Array." Department of Physics, Ohio State University, Columbus, OH 43210. 74.40.+k; 74.50.+r.
B. Hellebrand, X. Z. Wang, D. Baeuerle, M. Guillaume, P. Fischer, M. Vybornov, and P. Rogl, "Structural Analysis of Superconducting NdBa1.5Sr0.5Cu3O7-d." To be published in Physica C (in press). Institut fuer Angewandte Physik, Johannes Kepler Universitaet Linz, A-4040 Linz, AUSTRIA; telefax +43 732 2468 9242. Key words: NdBa1.5Sr0.5Cu3O7-d, structural phase transition, powder neutron diffraction, high-Tc superconductors. 74.70; 61.12; 64.00.
Takashi Hikihara and Francis C. Moon, "Aspects of Magnetic Levitation by Bulk High-Tc Superconductor Based on Dynamical Characteristics." To be published in the Proc. of the Int. Symp. on Nonlinear Electromagnetic Systems (ISEM), Cardiff, Wales, U.K., Sept. 17-20, 1995. 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.
J. P. Hodges, P. R. Slater, P. P. Edwards, C. Greaves, M. Slaski, G. Van Tendeloo, and S. Amelinckx, "Observation of Superconductivity (Tc = 50 K) in a New Tetragonal Alkaline-Earth Cuprate Sr0.8Ba1.2CuO3+d, Synthesized at Ambient Presssure." To be published in Physica C (in press). Contact P. P. Edwards, School of Chemistry, University of Birmingham, Birmingham B15 2TT, UNITED KINGDOM.
Takashi Hotta and Yasutami Takada, "Perturbation Expansion from the Limit of Zero Bandwidth in Infinite-Dimensional Electronic Systems: Fate of Divergence in the Self Energy in the Hubbard-Holstein Model." Technical Report of ISSP, Ser. A #3039, Jan. 1996; submitted to Phys. Rev. B. Institute for Solid State Physics, The University of Tokyo, 722-1 Roppongi, Minato-ku, Tokyo 106, JAPAN. 71.28.+d; 71.30.+h; 71.10.Fd; 71.38.+i.
M. A. Hubbard, M. B. Salamon, and B. W. Veal, "Fluctuation Diamagnetism and Mass Anisotropy of YBa2Cu3O6+x." To be published in Physica C, Vol. 333 (in press). Contact M. B. Salamon, Department of Physics, University of Illinois at Urbana-Champaign, 1110 W. Green Street, Urbana, IL 61801-3080. Key words: magnetization, fluctuation effects, critical phenomena, anisotropic superconductor, coherence length.
K. Imaeda, J. Kroeber, H. Inokuchi, Y. Yonehara, and K. Ichimura, "Superconductivity in NaH Intercalated C60." Institute for Molecular Science, Myodaiji, Okazaki 444, JAPAN; telephone +81 564 55 7470; telefax +81 564 54 2254; e-mail imaeda@ims.ac.jp. Key words: fullerenes, superconductors, electron paramagnetic resonance, x-ray and gamma-ray spectroscopies.
T. Ishida, K. Inoue, K. Okuda, H. Asaoka, Y. Kazumata, K. Noda, and H. Takei, "Anisotropy of Superconductivity in an Untwinned YBa2Cu3O7 Single Crystal." To be published in Physica C, Vol. 262 (in press). Department of Physics and Electronics, University of Osaka Prefecture, Sakai, Osaka 593, JAPAN; telefax +81 722 59 3340; e-mail ishida@center.osakafu-u.ac.jp.
T. Ishida, S. Kawamata, K. Okuda, H. Asaoka, Y. Kazumata, K. Noda, and H. Takei, "Torque Magnetometry of Twinned YBa2Cu3O7 Single Crystal." Presented at the 8th Int. Symp. on Supercond. (ISS'95), Hamamatsu, Japan, Oct. 30-Nov. 2, 1995. Department of Physics and Electronics, University of Osaka Prefecture, Sakai, Osaka 593, JAPAN; telefax +81 722 59 3340; e-mail ishida@center.osakafu-u.ac.jp. Key words: YBa2Cu3O7, single crystal, twin boundary, torque magnetometry.
Takekazu Ishida, Kiichi Okuda, Hidehito Asaoke, Yukio Kazumata, Kenji Noda, and Humihiko Takei, "Four-fold symmetry in the a-b Plane Torque of Untwinned YBa2Cu3O7 Single Crystal: Evidence for the Bulk d_[x^2-y^2] Superconductivity." Department of Physics and Electronics, University of Osaka Prefecture, Sakai, Osaka 593, JAPAN; telefax +81 722 59 3340; e-mail ishida@center.osakafu-u.ac.jp. 76.60.Ge; 74.72.Bk.
U. S. Joshi, K. M. Pansuria, D. G. Kuberkar, G. J. Baldha, and R. G. Kulkarni, "Effect of Hf and Hf-Ca Substitution on the Superconductivity of ErBa2Cu3O7-d." To be published in Physica C (in press). Contact R. G. Kulkarni, Department of Physics, Saurashtra University, Rajkot 360 005, INDIA.
D. Tristan Jover, "Role of Inequivalent CuO2 Layers in Thallium- and Mercury-Based High-Tc Superconductors Under High Pressure." To be submitted as a Ph.D. thesis (Dept. of Physics, Free University, May 23, 1996). Department of Physics and Astronomy, Free University, De Boelelaan 1081, 1081 HV Amsterdam, THE NETHERLANDS; telephone +31 20 444 7926; telefax +31 20 444 7899; e-mail tristan@nat.vu.nl.
K. Kadowaki, M. B. Gaifullin, T. Mochiku, Y. Matsuda, K. Kumagai, S. Takahashi, and M. Tachiki, "Longitudinal Josephson Plasma Oscillation in Bi2Sr2CaCu2O8+d Excited in a Microwave Cavity." Submitted to Phys. Rev. Lett., Feb. 8, 1996. Institute of Materials Science, The University of Tsukuba, 1-1-1 Tennodai, Tsukuba-shi, Ibaraki 305, JAPAN; telephone +81 298 53 5291; telefax +81 298 55 7440; e-mail kadowaki@ims.tsukuba.ac.jp. 74.25.Nf; 72.30.+q; 73.20.Mf; 74.50.+r.
B. Khaykovich, E. Zeldov, D. Majer, T. W. Li, P. H. Kes, and M. Konczykowski, "Vortex-Lattice Phase Transitions in Bi2Sr2CaCu2O8 Crystals with Different Oxygen Stoichiometry." To be published in Phys. Rev. Lett. (in press). Department of Condensed Matter Physics, The Weizmann Institute of Science, 76100 Rehovot, ISRAEL; e-mail fnboris@wis.weizmann.ac.il. 74.60.Ec; 74.60.Ge; 74.60.Jg; 74.72.Hs.
In-Seon Kim, Kyu Won Lee, Yong Ki Park, and Jong-Chul Park, "Properties of NdBa2Cu3O7-d Thin Film Prepared by Off-Axis rf Sputtering." To be published in Appl. Phys. Lett. (in press). Superconductivity Research Group, Korea Research Institute of Standards and Science, P.O. Box 102, Yusong, Taejon 305-600, REPUBLIC OF KOREA; telephone +82 42 868 5230; telefax +82 42 868 5022; e-mail inskim@krissol.kriss.re.kr or super203@krissol.kriss.re.kr.
Ulf Klein and Bernhard Poettinger, "Electronic Excitations of the Vortex Lattice in Superconductors." To be published in Lectures on Cooperative Phenomena in Condensed Matter, edited by D. I. Uzunov (Heron Press, Sofia, in press). Institut fuer Theoretische Physik, Universitaet Linz, A-4040 Linz-Auhof, AUSTRIA; e-mail klein@gwilli.tphy.uni-linz.ac.at.
P. Kovac, I. Husek, W. Pachla, H. Marciniak, and T. Melisek, "Improvement in Core Density of BSCCO/Ag Tapes by Cold Isostatic Pressing." To be published in Physica C (in press). Institute of Electrical Engineering, Slovak Academy of Sciences, Dubravska cesta 9, 842 39 Bratislava, SLOVAKIA. Key words: high-pressure effect, critical current density, grain alignment (texturing), scanning electron microscopy.
Alain J. Kreisler, Alain Gaugue, Zouhaier Ben Ayadi, Annick Degardin, and Jean-Michel Depond, "Recent Progress in HTSC Bolometric and Non-Bolometric Detectors." To be published in Oxide Superconductors: Physics and Nanoengineering II, edited by D. Pavuna and I. Bozovic (SPIE, Bellingham, 1996). Laboratoire de Genie Electrique de Paris, Universites Paris 6 et Paris 11, URA 127 CNRS, SUPELEC, Plateau de Moulon, F-91192 Gif Sur Yvette Cedex, FRANCE. Key words: high-Tc superconductors, photodetectors, bolometers, nonbolometric effects, mid infrared, far infrared, thin films, substrates, zirconia, thermal modeling.
V. N. Krivoruchko, "Upper Critical Fields of SuperconductorAntiferromagnet Superlattices." To be published in Oxide Superconductors: Physics and Nanoengineering II, edited by D. Pavuna and I. Bozovic (SPIE, Bellingham, 1996). Donetsk Physical and Technical Institute, National Academy of Sciences of Ukraine, 340114 Donetsk, UKRAINE. Key words: superconductor/magnetic metal superlattices, proximity effect, upper critical field, superconducting transition temperature.
S. Lambrecht and M. Ausloos, "Normal State Nernst Effect of a High Critical Temperature Superconductor." To be published in Phys. Rev. B. S.U.P.R.A.S., Institute of Physics B-5, University of Liege, Sart Tilman, B-4000 Liege, BELGIUM. 72.15.He; 74.72.Fq; 72.10.Bg.
J. Lesueur, S. Degoy, M. Aprili, D. Chambonnet, and D. Keller, "Thermodynamical Fluctuations and Critical Behavior in Weakly Disordered YBCO Thin and Ultra-Thin Films." Presented at the SPIE Photonics West '96 Conf., San Jose, CA, Jan. 27-Feb. 2, 1996; to be published in Oxide Superconductors: Physics and Nanoengineering II, edited by D. Pavuna and I. Bozovic (SPIE, Bellingham, 1996). CSNSM, CNRS-IN2P3, Universite Paris-Sud, Batiment 108, F-91405 Orsay, FRANCE; e-mail lesueur@csn-hp.in2p3.fr. Key words: high-Tc superconductors, fluctuations, paraconductivity, paracoherence, thin films, ion irradiation, disorder.
Y. D. Leu, W. N. Huang, C. M. Wang, and H.-C. Kao, "Superconductivity and Hole Concentration of La3-xCa2xBa3-xCu6Oy Compounds." To published in Physica C. Department of Chemistry, Tamkang University, Tamsui, Taiwan 25137, REPUBLIC OF CHINA; telephone +886 2 625 1661; telefax +886 2 622 8458; e-mail kaohci@mail.tku.edu.tw. Key words: superconductivity, hole concentration, La3-xCa2xBa3-xCu6Oy.
Ricardo P.S.M. Lobo, Francisco J. Gotor, Philippe Odier, and Francois Gervais, "Decoupling the Superconducting Condensate from Phonons in the Far-Infrared Spectra of YBa2Cu3O7-x." To be published in Spectroscopic Studies of Superconductors, edited by I. Bozovic and D. van der Marel (SPIE, Bellingham, 1996). Centre de Recherches sur la Physique des Hautes Temperatures, CNRS, F-45071 Orleans Cedex 2, FRANCE. Key words: high-Tc superconductors, infrared spectra, London parameters, Cooper pairs.
Y. M. Malozovsky and J. D. Fan, "Normal and Anomalous Responses of the Fermi-Liquid in the Charge and Spin Channels." To be published in Oxide Superconductors: Physics and Nanoengineering II, edited by D. Pavuna and I. Bozovic (SPIE, Bellingham, 1996). Department of Physics, Southern University and A & M College, Baton Rouge, LA 70813. Key words: cuprates, many-body theory, non-Fermi liquid behavior.
J. Mannhart, H. Hilgenkamp, B. Mayer, Ch. Gerber, J. R. Kirtley, K. A. Moler, and M. Sigrist, "Generation of Magnetic Flux by Single Grain Boundaries of YBa2Cu3O7-x." Submitted to Phys. Rev. Lett., Feb. 23, 1996. IBM Research Division, Zurich Research Laboratory, Saeumerstrasse 4, CH-8803 Rueschlikon, SWITZERLAND. 74.20.Hi; 74.60.Ge; 74.25.Ha; 74.76.Bz.
Taizo Masumi and Masakatsu Isobe, "Novel Concepts of Superconductive Optoelectronic Devices: Resonances of Photoconductivity in the Cu2O Gate Region." To be published in Oxide Superconductors: Physics and Nanoengineering II, edited by D. Pavuna and I. Bozovic (SPIE, Bellingham, 1996). Department of Electronic Engineering, Gunma University, Kiryu, Gunma 376, JAPAN. Key words: superconductive optoelectronic device, YBCO/Cu2O/YBCO, resonant photoconductivity, nanosecond device, exciton-mediated bipolaron, high-Tc superconductivity.
R. L. Meng, B. R. Hickey, Y. Q. Wang, Y. Y. Sun, L. Gao, Y. Y. Xue, and C. W. Chu, "Processing of Highly Oriented (Hg1xRex)Ba2Cu3O8+d Tape with x ~ 0.1." Preprint #96:014; submitted to Appl. Phys. Lett., Nov. 8, 1995. 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. Key words: Hg-based cuprate superconducting tape, processing, critical current density. 74.72.Jt; 74.72.Lw; 85.25.Kx.
Takeshi Mikayama, Takekazu Ishida, Kiichi Okuda, Hideto Asaoka, Yukio Kazumata, Kenji Noda, and Humihiko Takei, "Kim Critical State in Twinned YBa2Cu3O7 Single Crystal." Presented at the 8th Int. Symp. on Supercond. (ISS'95), Hamamatsu, Japan, Oct. 30-Nov. 2, 1995. Contact Takekazu Ishida, Department of Physics and Electronics, University of Osaka Prefecture, Sakai, Osaka 593, JAPAN; telefax +81 722 59 3340; e-mail ishida@center.osakafu-u.ac.jp. Key words: twin boundary, YBa2Cu3O7, single crystal, harmonic susceptibility.
Giovanni Modanese, "Updating the Theoretical Analysis of the Weak Gravitational Shielding Experiment." Preprint #UTF-367/96. I.N.F.N., Gruppo Collegato di Trento, Dipartimento di Fisica dell'Universita, I38050 Povo (TN), ITALY; e-mail modanese@science.unitn.it. 74.72.-h; 04.60.-m.
H. A. Mook, P. Dai, K. Salama, D. Lee, F. Dogan, G. Aeppli, A. T. Boothroyd, and M. E. Mostoller, "Incommensurate OneDimensional Fluctuations in YBa2Cu3O6.93." Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831-6393; telefax (423) 574-6268. 74.72.Bk; 61.12.Ex.
S. Oxx, D. P. Choudhury, Balam A. Willemsen, H. Srikanth, S. Sridhar, B. K. Cho, and P. C. Canfield, "Vortex Response and Critical Fields Observed via rf Penetration Depth Measurements on the Superconductor YNi2B2C." Submitted to Physica C, Feb. 19, 1996. Department of Physics, 112 Dana Research Center, Northeastern University, 360 Huntington Avenue, Boston, MA 02115; D. P. Choudhury's e-mail durga@sagar-3.physics.neu.edu; preprint also available at suprcon@xxx.lanl.gov (#9602003). Key words: borocarbide superconductors, penetration depth, lower critical field, upper critical field, flux pinning.
Dale J. Payne, Meera Chandrasekhar, H. R. Chandrasekhar, B. Jayaram, and J. Ulanday, "Evidence for Chain Site Substitution of Nickel in YBa2(Cu1-xNix)4O8." Submitted to Solid State Commun., Feb. 28, 1996. Department of Physics, University of Missouri, Columbia, MO 65211. Key words: high-Tc superconductors, phonons, inelastic light scattering.
M. V. Pedyash, D.H.A. Blank, and H. Rogalla, "Weak Link Properties of YBa2Cu3O7 Nanostructures." To be published in Oxide Superconductors: Physics and Nanoengineering II, edited by D. Pavuna and I. Bozovic (SPIE, Bellingham, 1996). Low Temperature Division, Department of Applied Physics, University of Twente, P.O. Box 217, 7500 AE Enschede, THE NETHERLANDS. Key words: high-temperature superconductivity, nanobridges, SQUIDs, surface vortex pinning.
David Pines, "Spin Fluctuations and d_[x^2-y^2] Pairing in the Cuprate Superconductors: A Progress Report." To be published in Lecture Notes in Physics: Proc. of the First Polish-U.S. Conf. on HTSC, Wroclaw, Poland, Sept. 11-15, 1995 (Springer-Verlag). Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801-3080.
A. I. Posazhennikova and M. V. Sadovskii, "Ginzburg-Landau Expansion and the Slope of the Upper Critical Field in Disordered Superconductors with Anisotropic Pairing." Submitted to JEPT Lett., Dec. 1995. Institute for Electrophysics, Russian Academy of Sciences, Ural Branch, Ekaterinburg 620049, RUSSIA; M. V. Sadovskii's e-mail sadovski@ief.intec.ru; preprint also available at cond-mat@xxx.lanl.gov (#9512178). 74.20.Fg; 74.20.De.
*C. Rossel, P. Bauer, D. Zech, J. Hofer, M. Willemin, and H. Keller, "Active Microlevers as Miniature Torque Magnetometers." Submitted to J. Appl. Phys., Nov. 3, 1995. IBM Research Division, Zurich Research Laboratory, Saeumerstrasse 4, CH-8803 Rueschlikon, SWITZERLAND. 07.55; 65.30.Gw; 75.50.-y; 75.60.-d; 74.30.Ci. *Revised paper.
C. Rossel, P. Bauer, D. Zech, J. Hofer, M. Willemin, H. Keller, and J. Karpinski, "Anisotropy Properties of high-Tc Microcrystals by a Miniaturized Torquemeter." Presented at the 10th Anniv. Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996; (Proc. to be published by World Sci., Singapore). IBM Research Division, Zurich Research Laboratory, Saeumerstrasse 4, CH8803 Rueschlikon, SWITZERLAND.
K. Salama, A. S. Parikh, and L. Woolf, "High Rate Melt Texturing of Nd1-xBa2+xCu3O7-d Type Superconductors." Preprint #96:013; to be published in Appl. Phys. Lett., April 1996. 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. V. Samoilov, M. V. Feigel'man, M. Konczykowski, and F. Holtzberg, "Upper Limit of the Bose-Glass Transition in YBa2Cu3O7 at High Density of Columnar Defects." To be published in Phys. Rev. Lett. Condensed Matter Physics 114-36, California Institute of Technology, Pasadena, CA 91125. 74.60.Ge; 74.20.De; 74.72.Bk.
A. W. Sandvik and A. Sudbo, "Phase Separation and the Existence of Superconductivity in a One-Dimensional Copper-Oxygen Model." National High Magnetic Field Laboratory, Florida State University, 1800 E. Paul Dirac Drive, Tallahassee, FL 32306.
D. Sanyal, P.M.G. Nambissan, D. Banerjee, and Udayan De, "New Findings from Positron Annihilation Measurements on Superconducting Transition in Oxides." To be published in Indian J. Phys. Department of Physics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Calcutta 700 009, INDIA. Key words: superconductivity, electron momentum distribution, positron annihilation. 74.70.Vy; 78.70.Bj; 74.20; 74.40.+k.
D. Sanyal, S. K. Patra, S. P. Chaudhuri, B. Nandi Ganguly, Udayan De, D. Banerjee, and R. Bhattacharya, "Study of Transition Metal Ion Doped Mullite by Positron Annihilation Technique." To be published in J. Mater. Sci. (U.K.). Department of Physics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Calcutta 700 009, INDIA.
A. Schilling, O. Jeandupeux, C. Waelti, H. R. Ott, and A. Van Otterloo, "High-Accuracy Specific-Heat Study on YBa2Cu3O7 and Bi2Sr2CaCu2O8.2 Around Tc in External Magnetic Fields." Presented at the 10th Anniv. Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996; (Proc. to be published by World Sci., Singapore). Lawrence Berkeley Laboratory and Department of Chemistry, University of California, Berkeley, CA 94720.
J. E. Schirber, L. Hansen, B. Morosin, J. E. Fischer, J. D. Jorgensen, and G. H. Kwei, "Effect of Pressure on the Superconducting Primitive Cubic and 'Polymeric' Phases of Na2CsC60." To be published in Physica C (in press). Sandia National Laboratories, Albuquerque, NM 87185.
M. Schmidt, T. R. Cummins, M. Buerk, D. H. Lu, N. Nuecker, S. Schuppler, and F. Lichtenberg, "Nature of the Electronic States in the Layered Perovskite Non-Cuprate Superconductor Sr2RuO4." To be published in Phys. Rev. B. Kernforschungszentrum Karlsruhe, Institut fuer Nukleare Festkoerperphysik, Postfach 3640, D-76021 Karlsruhe, GERMANY; e-mail schmidt@infp.fzk.de. 79.60.Bm; 73.20.Dx; 74.70.Ad; 74.80.Dm; 78.70.Dm.
H. Schwer, J. Karpinski, E. Kaldis, I. Meijer, C. Rossel, and M. Mali, "Evidence for Al Doping in the CuO2 Planes of YBa2Cu4O8 Single Crystals." Submitted to Physica C, Feb. 1996. Laboratorium fuer Festkoerperphysik, ETH Hoenggerberg, CH-8093 Zurich, SWITZERLAND. Key words: CuO planes, crystal structure, Al doping.
B. Seling, A. Ehmann, S. Kemmler-Sack, J. Linhart, and W. Reimers, "(Bi,Pb)-0212, Neutron Powder Diffraction and Superconductivity." Submitted to Physica C. Institut fuer Anorganische Chemie der Universitaet, Auf der Morgenstelle 18, D-72076 Tuebingen, GERMANY.
D. G. Steel, J. D. Hettinger, J. T. Parkman, M. E. Yoder, K. E. Gray, B. G. Glagola, and M. M. Eddy, "Importance of Vortex Interactions in Tl2Ba2CaCu2O8 Epitaxial Films with Columnar Defects." Submitted to Physica C. Science and Technology Center for Superconductivity and Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439.
A. G. Sun, A. Truscott, A. S. Katz, R. C. Dynes, B. W. Veal, and Chun Gu, "On the Direction of Tunneling in Pb/I/YBCO Tunnel Junctions." Submitted to Phys. Rev. B, Jan. 1996. Department of Physics, University of California at San Diego, La Jolla, CA 92093-0319.
Jiro Tanaka, "Symmetry of Pair Potential Deduced from ARPES and Neutron Scattering." To be published in Spectroscopic Studies of Superconductors, edited by I. Bozovic and D. van der Marel (SPIE, Bellingham, 1996). Faculty of Science, Kanagawa University, Hiratsuka 259-12, JAPAN.
Yukio Tanaka and Satoshi Kashiwaya, "Josephson Effect and Quasiparticle States in d-Wave Superconductors." To be published in Oxide Superconductors: Physics and Nanoengineering II, edited by D. Pavuna and I. Bozovic (SPIE, Bellingham, 1996). Department of Physics, Ikarashi, Niigata 950-21, JAPAN.
Sergey K. Tolpygo, J.-Y. Lin, Michael Gurvitch, S. Y. Hou, and Julia M. Phillips, "Effect of Oxygen Defects on Transport Properties and Tc of YBa2Cu3O6+x: Displacement Energy for Plane and Chain Oxygen and Implications for Irradiation-Induced Resistivity and Tc Suppression." To be published in Phys. Rev. B, Vol. 53, May 1, 1996. Department of Physics, State University of New York at Stony Brook, Stony Brook, NY 11794-3800; telephone (516) 632-8049; telefax (516) 6328774; e-mail stolpygo@ccmail.sunysb.edu. 72.25.-q; 72.25.Fy; 74.62.Dh; 74.76.Bz.
Sergey K. Tolpygo, J.-Y. Lin, Michael Gurvitch, S. Y. Hou, and Julia M. Phillips, "Universal Tc Suppression by In-Plane Defects in High Temperature Superconductors: Implications for Pairing Symmetry." To be published in Phys. Rev. B, Vol. 53, May 1, 1996. Department of Physics, State University of New York at Stony Brook, Stony Brook, NY 11794-3800; telephone (516) 632-8049; telefax (516) 6328774; e-mail stolpygo@ccmail.sunysb.edu. 72.25.-q; 72.25.Fy; 74.62.Dh; 74.76.Bz.
J. M. Tranquada, J. D. Axe, N. Ichikawa, Y. Nakamura, S. Uchida, and B. Nachumi, "Neutron Scattering Study of Stripe-Phase Order of Holes and Spins in La1.48Nd0.4Sr0.12CuO4." Submitted to Phys. Rev. B. Department of Physics, Brookhaven National Laboratory, Upton, NY 11973. 74.72.Dn; 75.25.+z; 75.70.Kw; 74.80.-g.
J. M. Tranquada, D. J. Buttrey, and V. Sachan, "Charge-Driven Stripe Order of Holes and Spins in La2-xSrxNiO4 with x = 0.225." Preprint #BNL-62680; submitted to Phys. Rev. B. Department of Physics, Brookhaven National Laboratory, Upton, NY 11973. 71.27.+a; 75.50.Ee; 75.30.Fv; 71.45.Lr.
G. Triscone, A. Junod, and R. E. Gladyshevskii, "Magnetic and Thermal Properties of the 116 K Superconductor Tl-1223." Submitted to Physica C, Feb. 13, 1996. Institute for Pure and Applied Physical Sciences 0360, University of California at San Diego, La Jolla, CA 92093-0360. Key words: Tl-1223, magnetization, specific heat, penetration depth, mixed state, irreversibility line, hysteresis loops, fluctuations.
C. R. Tylor, A. Das, C. Greaves, I. Zelenay, and R. Suryanarayanan, "Neutron Diffraction and Thermopower of Y1xPrxSr2Cu2.8Re0.2O6+z (x = 0 and 0.60)." To be published in Physica C. Contact R. Suryanarayanan, Laboratoire de Chimie des Solides, UA 446, CNRS, Universite Paris-Sud, 91405 Orsay, FRANCE; e-mail suryan@isma.isma.u-psud.fr.
V. K. Vlasko-Vlasov, U. Welp, G. W. Crabtree, D. Gunter, V. I. Nikitenko, V. Kabanov, and L. Paulius, "Meissner Holes in Remagnetized Superconductors." Presented at the 10th Anniv. Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996; (Proc. to be published by World Sci., Singapore). Institute for Solid State Physics, 142432 Chernogolovka, RUSSIA.
N. L. Wang, C. Geibel, and F. Steglich, "Out-of-Plane Conductivity in Bi2Sr2CuOy Crystals." To be published in Physica C (in press). Institut fuer Festkoerperphysik, Technische Hochschule Darmstadt, Hochschule Strasse 8, D-64289 Darmstadt, GERMANY; telefax +49 6151 164883; e-mail di3y@hrzpub.th-darmstadt.de. Key words: Bi2Sr2CuOy crystals, normal-state properties, electrical resistivity. 74.25.Fy; 74.72.Hs; 72.15.Eb.
X. L. Wang, X. M. Yang, H. W. Weber, R. Abraham, K. Lebbou, M. Th. Cohen-Adad, E. Halwax, and P. Wiede, "Growth and Characterization of (Tl,Pb)(Sr,Ba)2Ca2Cu3Oy Single Crystals." To be published in J. Cryst. Growth. Contact H. W. Weber, Atominstitut der OEsterreichischen Universitaeten, A-1020 Wien, AUSTRIA; e-mail weber@ati.ac.at.
B. D. Weaver and E. M. Jackson, "Temperature Dependence of Critical Current and Normal-State Resistance in Tl2Ba2CaCu2O8 Bicrystal Josephson Junctions." Submitted to Physica C, March 5, 1996. Naval Research Laboratory, Code 6615, Washington, DC 20375-5345. 74.50.+r; 74.70.Vy; 74.75.+t.
B. D. Weaver, G. P. Summers, R. L. Greene, E. M. Jackson, S. N. Mao, and W. Jiang, "Radiation Damage Effects in Nd2-xCexCuO4-y Thin Films." To be published in Physica C. Naval Research Laboratory, Code 6615, Washington, DC 20375-5345. 74.60.Mj.
Harald W. Weber, "Improvement of Flux Pinning in High Temperature Superconductors by Artificial Defects." Presented at the 10th Anniv. Workshop on Physics, Materials, and Applications, Houston, TX, March 1216, 1996; to be published in the Proc. (World Sci., Singapore). Atominstitut der OEsterreichischen Universitaeten, A-1020 Wien, AUSTRIA; e-mail weber@ati.ac.at.
W. Wong-Ng, L. P. Cook, F. Jiang, P.V.P.S.S. Sastry, and A. R. West, "Selected Phase Equilibria in the Bi-Sr-Ca-Cu-O System." Submitted to the Proc. of the TMS Ann. Mtg., Anaheim, CA, Feb. 5-8, 1996. Ceramics Division, A215 MATLS, NIST, Gaithersburg, MD 20899; telephone (301) 975-5791; telefax (301) 990-8729; e-mail wongng@tiber.nist.gov.
W. Wong-Ng, F. Jiang, and L. P. Cook, "Phase Equilibria of the BiPb-Sr-Ca-Cu-O System I: Subsolidus Phase Relationships of the Pb-SrCa-O System at 840^oC-850^oC in Air." Submitted to Physica C, 1996. Ceramics Division, A215 MATLS, NIST, Gaithersburg, MD 20899; telephone (301) 975-5791; telefax (301) 990-8729; e-mail wongng@tiber.nist.gov.
Winnie Wong-Ng, Gasper J. Piermarini, and Marcia R. Gallas, "X-ray Diffraction Study of BaLu2CuO5 and BaNd2CuO5 at High Pressures." Submitted to Powder Diffraction, 1996. Ceramics Division, A215 MATLS, NIST, Gaithersburg, MD 20899; telephone (301) 975-5791; telefax (301) 990-8729; e-mail wongng@tiber.nist.gov.
N. Yamasaki, H. Araki, A. A. Zakhidov, H. Mizobuchi, K. Yakushi, and K. Yoshino, "A New Metastable Superconductor Li2Na1NyC60 Prepared from Azides." To be published in Physica C, Vol. 259 (in press). Contact H. Araki, Department of Electronic Engineering, Faculty of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565, JAPAN; telefax +81 6876 4729; e-mail haraki@ele.eng.osaka.u.ac.jp. Key words: fullerene, C60 compound, granular superconductivity, microwave absorption, SQUID.
D. Zech, C. Rossel, L. Lesne, H. Keller, S. L. Lee, and J. Karpinski, "Angle-Dependent Reversible and Irreversible Magnetic Torque in Single-Crystalline Y2Ba4Cu8O16." Submitted to Phys. Rev. B, Dec. 22, 1995. Institute of Physics, University of Zurich, Winterthurerstr. 190, CH-8057 Zurich, SWITZERLAND. 74.70.Vy; 74.60.Ge; 74.60.Jg.
Lu Zhang, J. Z. Liu, I. C. Chang, and R. N. Shelton, "Dissipative Quantum-Creep Studies in Single-Crystal La2CuO4+d." To be published in Physica C, Vol. 259 (in press). Department of Physics, California State University, Stanislaus, Turlock, CA 95382; telefax (209) 667-3099.
X.-M. Zhu, E. Braendstroem, B. Sundqvist, and G. Baeckstroem, "Measurement of the Total Transverse Force on Moving Vortices in YBCO Films." Presented at the 10th Anniv. Workshop on Physics, Materials, and Applications, Houston, TX, March 12-16, 1996; (Proc. to be published by World Sci., Singapore). Department of Experimental Physics, Umea University, S-901 87, Umea, SWEDEN.
Kh. A. Ziq, N. M. Hamdan, and A. S. Al Harthi, "Temperature Dependence of the Magnetic Energy Losses in a Bi(2223) High-Tc Superconductor." Submitted to Physica C. Department of Physics, King Fahd University of Petroleum and Minerals, Dhahran 31261, SAUDI ARABIA. Key words: dissipation, hysteresis loops, ac losses.
Kh. A. Ziq, A. A. Pramana, and M. Faiz, "Magnetic Energy Losses in ZFC and FC States of an YBa2Cu3O7-d Single Crystal." Submitted to Phys. Rev. B1. Department of Physics, King Fahd University of Petroleum and Minerals, Dhahran 31261, SAUDI ARABIA. 74.25.Ha.
April 9 - 12, 1996: The 1996 IEEE International Magnetics Conference (INTERMAG '96), Westin Seattle Hotel, Seattle, WA. The 34th annual conference is a forum for engineers and scientists to discuss new developments in the field of applied magnetics. Invited and contributed papers, oral and postal sessions, and invited symposia. Presentations cover all branches of magnetism and related technology. For further information, contact Diane Suiters, Cecile Phillips, or Amy Landsbaum, INTERMAG '96 Conference, c/o Courtesy Associates, Suite 300, 655-15th Street, NW, Washington, DC 20005; telephone (202) 639-5088; telefax (202) 347-6109; e-mail magnetism@mcimail.com. Information also available at http://www.seas.gwu.edu/seas/institutes/intermag96.
April 19, 1996: The 1996 National Day on HTS, University of Liege, Liege, Belgium. Sponsored by the FNRS Contact Group on High Tc Superconductivity. Invited speakers in the morning will include J. MacManus-Driscoll (Imperial College) and V. V. Moshchalkov (U. Leuven). Discussions and contributions in the afternoon. No registration fee. Contact Prof. R. Deltour, Physique des Solides, CP 233, Universite Libre de Bruxelles, Blvd du Triomphe, B-1050 Brussels Belgium; telephone +32 2 650 57 51; telefax +32 2 650 59 16; e-mail rdeltour@ulb.ac.be. Or contact Marcel Ausloos, Group Chairman, Institut de Physique B5/3/54, Universite de Liege, Sart Tilman, B-4000 Liege, Belgium; telephone +32 41 66 37 52; telefax +32 41 66 29 90; e-mail ausloos@gw.unipc.ulg.ac.be. Information also available at http://www.phe.ulg.ac.be/.
*June 4 - 7, 1996: High Temperature Superconductor Thin Films -- Growth Mechanisms, Interfaces, Multilayers: HTS Symposium at the 1996 E-MRS Spring Conference, Strasbourg, France. A special session within this symposium will also be organized with the topic MOCVD of High Temperature Superconductors and Related Oxide Thin Films. Emphasis will be on the following topics: growth of HTS thin films and heterostructures, oxide thin film growth mechanisms, heterostructure fabrication and characterization, characterization of interface quality, defect analysis, and application of driven requirements for film growth and heterostructure quality. For further information, contact one of the conference chairs: H.-U. Habermeier, MPI-FKF Heisenbergstrasse 1, D-70569 Stuttgart, Germany, telephone +49 711-689-1372, telefax +49 711689-1389 or M. L. Hitchman, Dept. of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, UK; telephone +44 141 5534189, telefax +44 141 552-5664.
June 17 - 21, 1996: AIO Workshop: Superconductivity, Amelander Kaap, Hollum, Ameland, The Netherlands. Organized by the AIO-Network Materials Science. Objectives are to introduce graduate students to more advanced subjects within the context of superconductivity and hightemperature superconductivity. Some introductory lectures on a more elementary level will be given for those relatively new to the field. Advanced topics will include strong coupling theory, electronic structure of HTS materials, electrodynamical properties, vortices, and Josephson effects. Ph.D. students are invited to apply to participate and will be treated on a first-come first-served basis. Some funds are available for students from the Netherlands and other European countries. Participants will be expected to present a poster about their own research. No registration fee. Registration deadline, April 15, 1996. Contact Anita Severijnse, Laboratory of Solid State Physics, Materials Science Centre, R. U. Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands; telefax +31 50 363 4879.
*July 6 - 12, 1996: Solid State Chemistry '96, Bratislava, Slovak Republic. Conference will cover all aspects of modern solid-state chemistry including high-temperature ceramic superconductors; layered compounds, clathrates, and intercalates; non-oxide glasses; structure and properties of solids; electron structure and chemical bonding in solids; surface chemistry of solids; solid-state superionics; local structure and bonding in cementitious binding materials; and others. Commercial exhibition to be held during the conference. Official language is English. Abstract and pre-registration deadline, April 15, 1996. For further information, contact SSCH'96, Institute of Inorganic Chemistry, Slovak Academy of Sciences, SK-842 36 Bratislava, Slovak Republic; telephone +42 7 375 170; telefax +42 7 373 541; e-mail ssch96@savba.sk. Information also available from the WWW site http://www.savba.sk and will be updated continually.
*Aug. 8 - 14, 1996: XXI International Conference on Low Temperature Physics, Prague, Czech Republic. Sponsored by the International Union of Pure and Applied Physics. Main topics: quantum fluids and solids, superconductivity, low-temperature properties of solids, techniques, and applications. For further information, contact the LT21 Office, Low Temperature Laboratory, Institute of Physics ASCR, 250 68 Rez, Czech Republic; telephone and telefax +42 2 6857952; e-mail lt21@fzu.cz. Information also available on anonymous FTP at ftp.fzu.cz server, on WWW in the document http://www.fzu.cz/conferences/LT21.html, and by e-mail server lt21-mserver@fzu.cz.
*Aug. 19 - 31, 1996: Materials Aspects of High Tc Superconductivity: Ten Years after the Discovery, NATO Advanced Study Institute, European Cultural Center, Delphi, Greece. Purpose is to commemorate the 10th anniversary of this discovery by discussion of latest results in the HTS field. Particular emphasis on strong interaction between superconductivity and the materials properties of the cuprates. Lectures to include discussion of phase-separation problems and structural and electronic inhomogeneities (superstructures, staging, phase transitions, etc.). Lecturers will include G. Bednorz, Y. Berthier, A. Bianconi, M. C. Crawford, P. Edwards, A. Furrer, D. C. Johnston, M. Kastner, M. Marezio, K. A. Mueller, B. Raveau, H. Rietschel, Z. Schlesinger, and Z. X. Zhao. For information, contact Prof. E. Kaldis, Labor. fuer Festkoerperphysik ETH, CH-8093 Zurich, Switzerland; telephone +41 1 633 22 51; telefax +41 1 633 11 26; e-mail kaldis@solid.phys.ethz.ch. Information also available at http://www.physics.ntua.gr/NATOASI.html.
Sept. 17 - 20, 1996: International Symposium on Advances in Superconductivity: New Materials, Critical Currents, and Devices; Tata Institute of Fundamental Research, Bombay, India. Part of the Golden Jubilee celebration of TIFR. Main objective is to provide a forum to review the progress in the experimental and theoretical studies of the new superconductors. Emphasis on recent developments in areas of new materials and device applications. Plenary lectures, invited talks, panel discussions, and contributed and poster sessions. Topics will include new compounds and novel synthesis methods; vortex structure, pinning, and dynamics; active and passive devices; recent developments in high-Tc theories; thin films and artificial structures; critical currents, and novel applications. For further information, contact R. Pinto or P. Ayyub, Materials Research Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Bombay 400 005, INDIA; telephone +91 22 215 2971, ext. 2446; telefax +91 22 215 2110; e-mail asmccd@tifrvax.tifr.res.in or pushan@tifrvax.tifr.res.in.
*Feb. 28 - March 4, 1997: Fifth International Conference on Materials and Mechanisms of Superconductivity and High-Temperature Superconductors (M2S-HTSC-V), Beijing, China. Topics include high-Tc materials; physical properties of high-Tc materials; magnetism and superconductivity; vortices, pinning, and flux melting; thin films and multilayers; Josephson junctions; applications; heavy fermions; organic superconductors; fullerenes; and theory. Exhibition of high-Tc superconducting materials, low-temperature experimental appliances, and cryogenic engineering and refrigeration instruments. Conference language is English. Abstract deadline, September 1, 1996. For information, contact D. Jin, M2S-HTSC-V Secretariat, Cryogenic Laboratory, Chinese Academy of Sciences, P.O. Box 2711, Beijing 100 080, People's Republic of China; telephone +86 10 255 1143; telefax +86 10 256 4049; e-mail djin@cl.cryo.ac.cn.
March 6 - 8, 1997: International Workshop of Crystal Chemistry of HighTc Superconductors (CC-HTSC'97), Hefei, China. Satellite conference to the Fifth International Conference on Materials and Mechanisms of Superconductivity (M^2S-HTSC-V) at Beijing. Crystal chemistry, structure, as well as other related topics on high-Tc superconductors. (Submitted papers should not have been presented at the M^2S-HTSC-V Conf. in Beijing). Main topics are new superconductors and their crystal structures, microstructures and modulated structures, crystal growth and structure determination, electronic structures, chemical bonding in superconductors, phase diagram, crystal structure of fullerenes, intermetallic-compound superconductors, and other related materials. Conference language is English. Further details to be announced in second circular. For further information, contact LI XiaoGuang, CC-HTSC'97 Conference Secretary, Structure Research Laboratory, University of Science and Technology of China, Hefei, China; e-mail lixg@email.sc.ustc.ac.cn.
Information
New Volume: Handbook of Magnetic Materials, Vol. 8, edited by K.H.J. Bushchow. May be used as a textbook for introduction to specific topics in magnetism, or as a reference. Contains topical review articles written by specialists in difference fields, with each article consisting of graphical and tabular data. Some of the topics in Vol. 8 are magnetism in artificial and metallic superlattices of rare-earth metals, thermal expansion anomalies and spontaneous magnetostriction in rare-earth intermetallics, magnetic properties of rare-earth-Cu2 materials, and others. Publ. 1995; 542 pp.; price $220; ISBN 0-444481974-6. Contact Elsevier Science B.V., Attn. Judy Weislogel, P.O. Box 882, New York, NY 10159; telefax (212) 633-3680. Or contact Chris Ryan, P.O. Box 839, 1000 AV Amsterdam, The Netherlands; telefax +31 20 485 2886.
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New Gaussmeter: The Model 460 gaussmeter from Lake Shore is a highaccuracy full-featured, multichannel gaussmeter in which one, two, or three separate probes may be utilized or a single three- axis, two-axis, or differential probe may be used. For further information, contact Scott Young, Lake Shore Cryotronics,Inc., 64 East Walnut Street, Westerville, OH 43081-2399; telephone (614) 891-2243; telefax (614) 8911392; e-mail sales@lakeshore.com.
FIG. 1. An impressive demonstration of levitation by high-temperature
superconductors is shown in this picture courtesy of the Nihon Sumo
Kyokai, provided by Prof. S. Tanaka of the Superconductivity Research
Laboratory, International Superconductivity Technology Center (SRLISTEC). The disk is supported by a ring of Nd-Fe-B magnets levitating
over 200 melt-textured YBCO disks.
((Please look for this picture at our web site at http://www.iitap.iastate.edu/htcu/htcu.html or at our anonymous ftp site in the pub directory of hightc.ameslab.gov.)
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, #7, April 1, 1996.