HIGH-Tc UPDATE E-MAIL VERSION, VOL. 13, NO. 23, Dec. 1, 1999.
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<p>
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 letters are spelled out (Delta, mu, tau, pi, Omega), although delta is
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 are left as they appear: Tc, Jc, YBa2Cu3O7, O2. Mu-m is changed to
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 <hr>
<p>
 NOTA BENE:
<p>
 Theory
<p>
 A new orbital magnetization mode is predicted in a paper by A. V.
 Balatsky (Los Alamos) et al., who consider a superconducting state with
 mixed symmetry order parameter components, e.g., d + is or d + id' with
 d' = d_[xy]. The new mode corresponds to the oscillations of relative
 phase phi between two components around an equilibrium value of phi =
 pi/2 and is similar to the so-called clapping mode in superfluid [3]^He-
 A. The authors estimate the frequency of the mode omega_0(B,T) as a
 function of magnetic field and temperature for the specific case of a
 magnetic-field-induced d' = d_[xy] state. They find that this mode is
 tunable with field as omega_0(B,T) proportional to BDelta_0, where
 Delta_0 is the magnitude of the d-wave order parameter, and they
 estimate the velocity s(B,T) of this mode. The authors also suggest
 that this mode could be experimentally detected by ac magnetic
 susceptibility and possibly by ultrasound attenuation in the mixed state
 as a function of applied field.
<p>
 The properties of a d-wave order parameter in the region of a (100)
 interface between two d_[x^2-y^2] superconductors have been investigated
 by A. M. Martin (Geneve) and J. F. Annett (Bristol). The authors
 determined how the barrier height at the interface influences the local
 density of states and the Josephson current. In particular, the authors
 identified three distinct regimes with qualitatively different behavior,
 corresponding to weak, intermediate, and strong barriers.
<p>
 Predictions for non-BCS-like temperature dependencies in thermodynamic
 and transport properties within the class of short-coherence-length
 superconductors are presented in a preprint by Q. Chen et al. (Chicago).
 The authors use a BCS - Bose-Einstein crossover theory below Tc and find
 that at moderate and strong coupling the predicted behavior reflects the
 quasi-ideal Bose-gas structure of the underlying ground state. These
 observations provide a way to distinguish between this crossover
 scenario and an alternative phase-fluctuation approach applied to the
 same class of materials. The authors address the Knight shift,
 superfluid density, and specific heat and find support for their theory
 in comparisons with existing data on both organic and high-temperature
 superconductors.
<p>
 The effects of nonmagnetic impurities on the neutron scattering
 intensity have been studied by N. Bulut (Koc) for a model of the copper-
 oxide layers in the normal state. Using the random-phase approximation,
 the author calculates the contribution to the Q = (pi,pi) neutron
 scattering intensity from processes involving the scattering of spin
 fluctuations from an impurity with large momentum transfers. The author
 finds that this type of scattering could lead to a peak in the neutron
 scattering intensity in the normal state.
<p>
 A preprint by A. V. Lopatin (Rutgers) considers a disordered
 superconducting film in a magnetic field close to the upper critical
 field. Assuming that the phase transition to the glassy superconducting
 state exists and that it is of second order, the author shows that it is
 exactly described by a zero-dimensional replica model having the form of
 that used to describe the phase transition in the Sherrington-
 Kirkpatrick spin-glass model. While the total magnetic moment of the
 film close to the phase transition is diamagnetic, the part emerging due
 to the phase transition is paramagnetic, thus showing a tendency toward
 the paramagnetic Meissner effect.
<p>
 Coulomb-gas ordering in 3D layered systems has been studied by Yu. G.
 Pashkevich and A. E. Filippov (Donetsk) using a Brownian dynamics
 approach. At small density, the particles inside the layers can
 associate into droplets that collectively repel between neighboring
 layers. These droplets possess a local stripe structure, which orders
 spontaneously along a certain direction.
<p>
 A key step in an inversion algorithm to recover a spatially dependent
 penetration depth lambda(z) for a superconductor in the Meissner state
 from one-dimensional magnetic force microscopy (MFM) has been
 demonstrated numerically by M. W. Coffey (Colorado). The author shows
 how to determine the profile lambda(z) as a function of the distance z
 into a superconducting half space.
<p>
<p>
 Josephson-Coupled Systems
<p>
 An approximate analytic solution for an in-plane Josephson vortex (or
 Josephson fluxon) in layered superconductors and stacked Josephson
 junctions (SJJs) has been obtained by V. M. Krasnov (Chalmers University
 of Technology and ISSP-Chernogolovka) for an arbitrary number of layers.
 For the case of a large number of layers, the variation of the phase and
 current is confined within the Josephson penetration depth lambda_J
 along the layers, while the magnetic field decays with the effective
 penetration depth lambda_c >> lambda_J. To compare with real high-Tc
 superconducting samples, the author presents large-scale numerical
 simulations with up to 600 SJJs with in-plane lengths up to 4000
 lambda_J. The most striking feature of the in-plane vortex is a
 Josephson core, manifested as a sharp peak in the magnetic induction at
 the vortex center.
<p>
 A theoretical study of Cherenkov radiation of Josephson plasma waves by
 a fast-moving Josephson fluxon in a stack of coupled long Josephson
 junctions has been carried out by E. Goldobin (Juelich) et al. Using
 numerical simulations, the authors found that the current-voltage
 characteristics exhibit back-bending on the fluxon step for some values
 of the parameters. For another limit, the emission of Cherenkov
 radiation can occur. The authors discuss the problem of how to detect
 Cherenkov radiation in linear junctions.
<p>
 A preprint by E. Goldobin (Juelich) and A. V. Ustinov (Erlangen-
 Nuernberg) reports an experimental and theoretical study of the
 influence of a resistive (phase-whirling) state in one junction of a
 two-junction Josephson stack upon the fluxon motion in the other
 junction. In the experiment, the authors measure the fluxon velocity
 versus current in one junction as a function of the state (Meissner or
 resistive) of the neighboring junction. The analysis, made in the limit
 of high fluxon density, shows that the interaction with the resistive
 state results in an increase of the effective damping for the moving
 fluxon and thus produces a corresponding decrease in its velocity.
<p>
 The quantum-phase-transition properties of a three-dimensional periodic
 array of Josephson junctions with charging energy including both the
 self and mutual junction capacitances have been studied by T. K. Kopec
 (Wroclaw) and J. V. Jose (Northeastern). The authors used the phase-
 fluctuation algebra between number and phase operators, given by the
 Euclidean group E_2, and they map the problem onto a solvable quantum
 generalization of the spherical model. The authors obtain a phase
 diagram as a function of temperature, Josephson coupling, and charging
 energy, and they analyze the corresponding fluctuation conductivity and
 its universal scaling form in the vicinity of the zero-temperature
 quantum critical point.
<p>
<p>
 Vortices
<p>
 Using a high-angular-resolution vector magnetometer, A. A. Zhukov
 (Southampton and Karlsruhe) et al. have studied the components of the
 magnetic moment parallel and transverse to the CuO2 planes in YBa2Cu3O7-
 d (Y-123) single crystals. When a magnetic field was applied very
 nearly parallel to the CuO2 planes, full shielding of the transverse
 field component, originating from the infinite tilt modulus of the
 vortex-locked state, was observed only for the lowest fields. The
 authors related the suppression of the transverse shielding to entropy-
 induced fragmentation of the locked state by thermally activated kinks.
 The authors introduce a simple model that accounts for the reduced
 shielding and describes the angular behavior of the critical current.
<p>
 Vortex dynamics at radio frequency (3.3 MHz) has been studied by S.
 Patnaik (IIT-Kanpur) et al. in flexible tape samples of Bi2Sr2CaCu2O8+d
 (Bi-2212) as a function of the temperature, dc magnetic field, and field
 orientation relative to the plane of the tape. The rf response in the
 geometry when the dc field is perpendicular to the tape suggests two
 distinct regimes of vortex dynamics, one corresponding to a moderately
 pinned 3D vortex solid and the other to a liquid of 2D vortices.
<p>
 Transport and magnetization properties of NdBa2Cu3O7-d (Nd-123) single
 crystals grown by the traveling-solvent floating-zone (TSFZ) and self-
 flux (SF) methods under low O2 partial pressure have been studied by A.
 K. Pradhan et al. (SRL-ISTEC). The TSFZ-grown crystal shows a
 continuous transition exhibiting vortex-glass behavior in the V-I
 characteristics for H = 1 T. On the other hand, a first-order melting
 transition, as evidenced by a kink and hysteresis in resistance, was
 observed in the crystal grown by the SF method under 0.03% O2 partial
 pressure. The authors suggest that the different behavior in the two
 crystals indicates that the presence of twin planes and substitutional
 defects play a major role in the observed vortex dynamics.
<p>
<p>
 RBa2Cu3O7-d
<p>
 The magnetization of top-seeded melt-processed NdBa2Cu3O7-d (Nd-123)
 containing 15 mol% Nd4Ba2Cu2O10 (Nd-422) has been investigated by H.
 Hari Babu et al. (IRC-Cambridge) using vibrating-sample magnetometry
 over a wide temperature (50 K < T < 94 K) and field (0 < mu_0H < 12 T)
 range. The authors discuss the origin of the peak in the M-H loops and
 the high irreversibility field observed in this system. The normalized
 pinning force determined from the hysteresis width was found to scale as
 a function of the reduced magnetic field (h = H/H_[irr]) with a peak at
 h_[max] = 0.33, suggesting that normal defects dominate the pinning
 mechanism in this material. This contradicts recent reports suggesting
 that the peak effect in Nd-123 is associated with a local variation in
 the superconducting transition temperature due to the formation of a
 distributed solid-solution phase in the Nd-123 matrix.
<p>
 The temperature dependence of the optical reflectivity of YBa2Cu3O7-d
 (YBCO) at the femtosecond time scale has been investigated by O. V.
 Misochko (ISSP-Chernogolovka and KARC-Kobe) et al. The authors detect
 oscillations associated with two A_[1g] metal-ion phonon modes in both
 the normal and superconducting states, and they compare the behavior
 with that obtained by frequency-domain (Raman) spectroscopy. Even
 though similar lattice anomalies were observed in both time and
 frequency domains, the authors' analysis shows that the coherent lattice
 dynamics is different from the ordinary (thermal state) dynamics probed
 by frequency-domain spectroscopy.
<p>
 A cellular-automata model has been developed by D. M. Bubb and J. F.
 Federici (New Jersey Institute of Technology) to explain persistent
 photoconductivity (PPC) in underdoped YBCO. The authors' model is based
 on the idea that trapped electrons in the basal plane lead to structural
 rearrangements when illuminated with light ranging from infrared to
 ultraviolet wavelengths. Using a single-band model, the authors are
 able to account for both the magnitude of the PPC effect and the
 stretched-exponential dependence of the resistivity on illumination
 time.
<p>
<p>
 Bi Cuprates
<p>
 The Fermi surface of Bi2Sr2CaCu2O8+d (Bi-2212) has been studied by H. M.
 Fretwell (UIC) et al. using angle-resolved photoemission (ARPES) with a
 momentum resolution of ~0.01 of the Brillouin zone dimensions. The
 authors show that, contrary to recent suggestions, the Fermi surface is
 a large hole barrel centered at (pi,pi), independent of the incident
 photon energy.
<p>
 The influence of nanometer-size (10-100 nm) SiC particles on the flux-
 pinning and magnetization critical current density J_[cm] of Ag-sheathed
 (Bi,Pb)2Sr2Ca2Cu3Ox [(Bi,Pb)-2223] superconducting tapes has been
 studied by Z. Q. Yang (Shenyang) et al. The authors found that below 40
 K, SiC particles up to 0.5 wt% introduce additional flux-pinning centers
 and enhance J_[cm]. The authors attribute the enhanced pinning
 properties to the small SiC particles dispersed in the superconducting
 matrix and to the secondary defects at the interface between the SiC
 particles and the superconducting matrix.
<p>
 Diffusion studies by P. Majewski (MPI-Stuttgart) of (Bi,Pb)-2223 tapes
 wrapped in Ag have shown that Cu atoms from the 2223 ceramic diffuse
 into the Ag sheath during annealing, resulting in a decrease of the Cu
 content of the ceramic. The authors measured the diffusion coefficient
 to be 1.8 x 10^[-11] cm^2/s at 815^oC. The authors did not observe
 diffusion of Bi, Pb, Sr, or Ca into Ag.
<p>
<p>
 Other Cuprates
<p>
 The observation of low-frequency phonons excited by femtosecond laser
 pulses in single-crystal YBa2Cu4O8 (Y-124) is reported by O. V. Misochko
 (KARC-Kobe and ISSP-Chernogolovka) et al. In the transient time-
 resolved reflectivity, the authors detected the oscillations associated
 with two fully symmetric metal-ion phonons. The authors compare the
 time- and frequency-domain results for Y-124 and compare the coherent
 phonons in Y-124 and Y-123.
<p>
 Neutron-powder-diffraction results and Tc measurements have been carried
 out by Y. Idemoto (Science University of Tokyo) et al. on
 (Nd0.675Ce0.325)2(Ba0.664Nd0.336)2Cu3.00Oy samples with different oxygen
 contents. The crystal structure of this material can be regarded as a
 modified Y-123 structure, in which the Y layer is replaced by a
 (Nd,Ce)2O2 block. Superconductivity appears in a narrow range of y =
 9.12-9.14, in which the Cu valence changes from 2.32 to 2.33, while the
 Ce valence remains at +4.
<p>
 The evolution with doping and temperature of the polaronic absorption in
 superconducting Nd2-xCexCuO4 (NCCO) has been studied by S. Lupi (Roma)
 et al. across the whole phase diagram. The authors find that the
 polaron band softens with increasing doping, is still present in the
 superconducting phase, and vanishes in the overdoped metallic phase.
<p>
<p>
 Coated Conductors
<p>
 Magnetron deposition techniques have been used by N. Savvides et al.
 (CSIRO) to fabricate YBCO coated tapes. Biaxially aligned YSZ buffer
 layers, 300 nm thick, were deposited at room temperature onto Hastelloy
 (Has) substrates using magnetron ion-beam-assisted deposition (IBAD).
 Epitaxial YBCO films of thickness 200-400 nm were deposited onto the
 YSZ/Has tapes at 730^oC using unbalanced magnetron sputtering. The
 crystalline quality and texture of the film, determined by x-ray
 diffraction (theta-2theta, rocking curves or omega-scans, phi-scans, and
 pole figures), showed that the buffer layers were biaxially aligned with
 a (111) pole in the direction of the ion beam and minimum Delta[phi] =
 13 degrees. The best YBCO tapes had a (103) pole Delta[phi] = 10
 degrees. Measurements of the critical current density showed a clear
 dependence on Delta[phi] (Jc proportional to 1/Delta[phi]), and the best
 YBCO tapes had Jc(77 K) = (0.9-1.2) x 10^6 A/cm^2. The authors note
 that this method of tape fabrication is technologically important in
 that it uses magnetrons, which are easily scalable, to deposit both the
 IBAD YSZ buffer layer and the YBCO film.
<p>
 Pulsed-laser deposition (PLD) has been used by R. Wang et al. (Beijing)
 to deposit YBCO films on biaxially textured Ag{110}<211> substrates.
 Studies by x-ray diffraction revealed that the degree of preferential
 orientation of Ag{110}<211> substrates varied with annealing
 temperature. The authors found that by depositing a thin YBCO template
 layer at low temperature, YBCO films with c-axis orientation and in-
 plane biaxial alignment could be obtained at high deposition
 temperature. The best YBCO film had a Jc = 5 x 10^5 A/cm^2 at 77 K and
 zero field.
<p>
<p>
 Films
<p>
 By using a field-effect-transistor configuration, T. Doderer et al.
 (IBM-Yorktown) have demonstrated that it is possible to dope electrons
 or holes into an initially underdoped YBa2Cu3O7-d film at room
 temperature. The results of systematic measurements of the dual-type
 (electron or hole) transconductance indicate comparable field-effect
 mobilities for electrons and holes. The authors propose a model based
 on band bending and localized electronic states within the band gap of
 the Mott insulator to explain the dual-type charge transport.
<p>
 The dependence of a- or c-orientation upon substrate temperature T_s
 (600-700^oC) in the growth of YBa2Cu3O7-d thin films on MgO by ion-beam
 sputtering has been studied by T. Endo et al. (Mie). The sputtering was
 carried out with a supply of either oxygen molecules or plasma. At
 600^oC, a-axis growth (a axis normal to the substrate) dominates over c-
 axis growth, while the fraction of c-axis orientation grows at the
 expense of a-axis orientation with increasing T_s. The growth of a-axis
 orientation is enhanced by the plasma supply when T_s < 660^oC. The
 authors discuss the mechanisms of a- or c-orientation in terms of
 surface migration and surface energy during growth.
<p>
 The effects of oxygen plasma on the early stages of the growth of Ca-
 doped Bi2Sr2CuO6 (Bi-2201) thin films on lattice-mismatched MgO (100)
 substrates have been investigated by M. Tada (Mie) et al. First an
 amorphous layer grows at the interface, and then the Bi-2201 crystal
 grows on it. The authors found, however, that if the substrate surface
 is first cleaned by the oxygen plasma, the amorphous layer is reduced in
 thickness and the Bi-2201 crystal grows earlier.
<p>
 The growth of Tl-based high-Tc superconducting films prepared by aerosol
 deposition is reported in a preprint by G. Plesch (Comenius) et al. The
 authors describe their process techniques, which involve precursors of
 Ba-Ca-Cu-O or Pb-Sr-Ba-Ca-Cu-O, which are then thallinated.
<p>
<p>
 Applications
<p>
 Single and multiphase ac loss measurements in four-layer prototype
 multistrand conductors (PMCs) of length 1 m wound from HTS [(Bi,Pb)-
 2223] tape are reported by J. O. Willis (Los Alamos) et al. Single-
 phase losses were found to be purely hysteretic in nature and to vary
 approximately as I^3. Two-phase losses were measured with no current
 flowing in the PMC but with an external ac magnetic field generated by
 two normal conductors arranged at the remaining corners of an
 equilateral triangle forming a three-phase configuration. The two-phase
 loss measurements revealed two loss mechanisms with different frequency
 dependencies: one hysteretic in nature and the second eddy-current-
 like. The second term saturates near or above power-line frequencies.
 The magnitude of the total two-phase losses was found to vary
 approximately as I^[2.6].
<p>
 Measurements of the ac losses in short pieces (10 cm) of Bi-2223/Ag tape
 conductor in either a unidirectional field of arbitrary direction or a
 rotating magnetic field are reported by J. J. Rabbers et al. (Twente).
 The authors found that the magnetization loss in a rotating magnetic
 field can be described, in most cases, in terms of just the component of
 the magnetic field perpendicular to the wide face of the tape conductor.
 The component of the magnetic field parallel to the wide face produces a
 much smaller contribution to the losses.
<p>
 A comprehensive data set on the losses of an untwisted (Bi,Pb)-2223
 multifilamentary tape at 77.4 K is presented in a paper by S. P.
 Ashworth and M. Suenaga (Brookhaven). These losses, measured using a
 recently developed calorimetric technique, reveal how an applied ac
 magnetic field interacts with an ac transport current of the same
 frequency to produce energy losses in the superconductor. The data
 indicate that the major interaction between the field and current occurs
 when the applied field is perpendicular to the tape face. This implies
 that the major contribution to the transport losses must come from the
 self magnetic field penetrating from the edges of the conductor, not
 from the faces.
<p>
 Measurements of the total ac losses Bi-2223/Ag tapes in an applied
 magnetic field (parallel to the tape face but perpendicular to the
 length) have been measured by T. Hughes (Wollongong) et al. for tapes
 with twisted and untwisted filaments. The authors found that the losses
 for the tape with twisted filaments (pitch = 10 mm) were considerably
 less than for a corresponding tape with untwisted filaments over the
 entire range of frequencies (37-200 Hz) and field amplitudes (< 45 mT).
<p>
 A paper by X. S. Rao et al. (Singapore) reports an anomalous microwave
 response of YBCO microstrip resonators in the presence of a weak dc
 magnetic field H_[dc]. The authors found that the surface resistance
 R_s and reactance X_s show a correlated nonmonotonic behavior as a
 function of H_[dc]. Both R_s and X_s were found to initially decrease
 with elevated H_[dc] and then to increase after H_[dc] reached a
 crossover field H_c, which was independent of the amplitude and
 frequency of the microwave field.
<p>
 Large fluctuating signals of microwave absorption in Bi-2212 high-
 temperature superconductors have been found by K.-I. Itoh et al. (Mie)
 to be associated with the bubbling of liquid nitrogen. The authors note
 that this is a new bolometric function of the high-temperature
 superconductors.
<p>
 The fabrication and investigation of ferroelectric-superconductor field-
 effect transistors (FSuFETs) consisting of YBa2Cu3O7-d (YBCO) channels
 and Pb(Zr0.54Ti0.46)O3 (PZT) gate insulators are described in a paper by
 R. Aidam et al. (Karlsruhe). To prevent degradation of the YBCO layer,
 a thin SrTiO3 (STO) buffer layer was inserted between the YBCO and the
 PZT. Ferroelectric polarization charging effects were observed in YBCO
 channels thinner than 20 nm. Modulations of the resistivity, critical
 temperature, and critical current density reflected ferroelectric
 hysteresis of the PZT layer. The changes amounted to up to 10%, 1K, and
 16%, respectively. The authors attribute the modulations and their
 polarity dependencies to a charging effect and p-type conduction in
 YBCO. Reversing the polarization state led to a nonvolatile change of
 the YBCO properties.
<p>
 A preprint by A. Yu. Kidiyarova-Shevchenko (Chalmers University of
 Technology and Moscow State) et al. reports the investigation of
 different comparators for flash and Sigma-Delta high-temperature-
 superconducting ADCs (analog to digital converters), designed using
 three-layer YBCO grain-boundary-junction integrated-circuit technology.
 The spread of junction critical currents was less than 10%, and the
 feature size was 0.6 micrometer. Using the theoretical estimations for
 the bit error rate in RSFQ (rapid single flux quantum) circuits under
 the restrictions of this technology, the authors estimated the optimal
 working temperature to be T = 62 K. At this temperature, the circuits
 were optimized to achieve maximum performance of the related ADCs in
 terms of input bandwidth, resolution, and operating margins. The
 authors also describe the development of a new method for inductance
 calculations with 3D magnetic-field distributions in multilayer
 superconducting technology, permitting the extraction of the inductance
 matrix of the equivalent circuit.
<p>
<p>
 Book Chapter
<p>
 Experiments using muSR (i.e., muon spin rotation, relaxation, or
 resonance) to investigate the fullerenes are reviewed in a book chapter
 by E. J. Ansaldo (Saskatchewan). One of the states of the muon is the
 quasi-free, diamagnetic state, in which the muon acts as a interstitial
 positively charged particle with a magnetic moment, which is sensitive
 to local magnetic fields such as those of the vortex lattice in
 superconducting RbC60. The author notes that the vortex-lattice
 structure and the penetration depth obtained via muSR helped to
 determine the origin of superconductivity in the superconducting AxC60
 (A = alkali metal) compounds (41 refs.).
<p>
<p>
 Contributed by John R. Clem
<p>
 <hr>
<p>
 Contents: Preprints begin on page 5; Coming Events are on page 12;
 Resources begin on page 12; and Donors are listed on page 13.
<p>
 <hr>
<p>
 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.
<p>
<p>
 PREPRINTS
 To obtain a particular preprint, contact the first author at the address
 given at the end of the citation. Help us expand this list by sending
 us your complete preprint. Please specify where and when your paper was
 submitted. An * next to an entry indicates it is a correction or
 revision of a previous entry. PACS codes and/or key words are given at
 the end of the citation.
<p>
 R. Aidam, D. Fuchs, and R. Schneider, "Ferroelectric Field Effect in
 YBa2Cu3O7-d Thin Films." To be published in Physica C (in press).
 Forschungszentrum Karlsruhe, Institut fuer Nukleare Festkoerperphysik,
 P.O. Box 3640, D-76021 Karlsruhe, GERMANY; e-mail <a href="mailto:aidam@infp.fzk.de">aidam@infp.fzk.de.</a>
 Key words: thin films, YBCO, buffer layer, ferroelectrics, three-
 terminal devices. 74.76.Bz; 85.25.Hv; 85.30.Tv; 85.50.+k.
<p>
 Ali Riza Akcay, "The Enhancement of the Special Theory of Relativity
 Towards the Prediction of the Space-Time Singularities." TUBITAK/UEKAE,
 P.O. 21, 41470 Gebze, Kocaeli, TURKEY; telephone +90 262 648 1356;
 telefax +90 262 648 1100; e-mail <a href="mailto:aakcay@yunus.mam.gov.tr">aakcay@yunus.mam.gov.tr;</a> preprint also
 available at <a href="http://xxx.lanl.gov/abs/gr-qc/9909077">http://xxx.lanl.gov/abs/gr-qc/9909077.</a> Key words:
 "formula A," enhanced Einstein's famous formula (EEFF), Einstein's
 famous formula (EFF), high-Tc superconductivity, space-time
 singularities.
<p>
 Ali Riza Akcay, "Transmission of the Infinite Frequencies by Using High-
 Tc Superconductors." TUBITAK/UEKAE, P.O. 21, 41470 Gebze, Kocaeli,
 TURKEY; telephone +90 262 648 1356; telefax +90 262 648 1100; e-mail
 <a href="mailto:aakcay@yunus.mam.gov.tr">aakcay@yunus.mam.gov.tr;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9909373">http://xxx.lanl.gov/abs/cond-mat/9909373.</a>
<p>
 I. I. Akimov, A. K. Shikov, T. P. Krinitsina, S. V. Sudareva, E. P.
 Romanov, and L. V. Budanova, "Effect of Ag-Sheath Doping on Structure
 and Properties of Bi-Ceramic-Based Composites." To be published in
 Physica C (in press). Contact T. P. Krinitsina, Institute of Metals
 Physics, Ural Division of RAS, GSP-170, S. Kovalevskaya Str. 18,
 Ekaterinburg 620219, RUSSIA; telephone +7 343 249 9032; telefax +7 343
 274 5244; e-mail <a href="mailto:krinitsina@imp.uran.ru">krinitsina@imp.uran.ru.</a> Key words: HTSC composites,
 doped silver sheath, structure, mechanical and superconducting
 properties.
<p>
 E. J. Ansaldo, "Muon (muSR) Spectroscopy of the Fullerenes." To be
 published in Nuclear and Radiochemical Approaches to Fullerene Sciences;
 edited by T. Braun (Kluwer Academic Publ., 2000). Department of
 Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 0W0,
 CANADA; e-mail <a href="mailto:ans@erich.triumf.ca">ans@erich.triumf.ca</a> or <a href="mailto:ansaldo@usask.ca">ansaldo@usask.ca.</a>
<p>
 S. P. Ashworth and M. Suenaga, "Experimental Determination of the Losses
 Produced by the Interaction of ac Magnetic Fields and Transport Currents
 in HTS Tapes." To be published in Physica C. Materials Science
 Division, Brookhaven National Laboratory, Building 480, P.O. Box 5000,
 Upton, NY 11973-5000; telephone (516) 344-5413; telefax (516) 344-4071;
 e-mail <a href="mailto:ashworth@bnl.gov">ashworth@bnl.gov.</a>
<p>
 N. Hari Babu, D. A. Cardwell, W. Lo, and A. M. Campbell, "Flux Pinning
 in Large NdBCO Grains Fabricated by Seeded Melt Growth." To be
 published in Phys. Rev. B. Interdisciplinary Research Centre in
 Superconductivity, University of Cambridge, Madingley Road, Cambridge
 CB3 0HE, UNITED KINGDOM; D. A. Cardwell's telephone +44 1223-337050 or
 -337076; telefax +44 1223-337074; e-mail <a href="mailto:dc135@hermes.cam.ac.uk">dc135@hermes.cam.ac.uk.</a>
<p>
 B. J. Baelus, F. M. Peeters, and V. A. Schweigert, "The Superconducting
 State in Superconducting Rings." Departement Natuurkunde, Universiteit
 Antwerpen (UIA), Universiteitsplein 1, B-2610 Antwerpen, BELGIUM; F. M.
 Peeters' e-mail <a href="mailto:peeters@uia.ua.ac.be">peeters@uia.ua.ac.be;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9910030">http://xxx.lanl.gov/abs/cond-mat/9910030.</a> 74.25.Ha; 74.60.Ec; 73.20.Dx.
<p>
 A. V. Balatsky, P. Kumar, and J. R. Schrieffer, "Collective Mode in a
 d_[x^2-y^2] + id_[xy] Superconductor." Theoretical Division, Los Alamos
 National Laboratory, Los Alamos, NM 87545; e-mail <a href="mailto:avb@viking.lanl.gov">avb@viking.lanl.gov;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/9910342">http://xxx.lanl.gov/abs/cond-mat/9910342.</a>
<p>
 M. Bocquet, D. Serban, and M. R. Zirnbauer, "Disordered 2D
 Quasiparticles in Class D: Dirac Fermions with Random Mass, and Dirty
 Superconductors." M. Zirnbauer's e-mail <a href="mailto:zirn@thp.uni-koeln.de">zirn@thp.uni-koeln.de,</a> preprint
 available at <a href="http://xxx.lanl.gov/abs/cond-mat/9910480">http://xxx.lanl.gov/abs/cond-mat/9910480.</a>
<p>
 V. Bruyndoncx, L. Van Look, and V. V. Moshchalkov, "Nucleation of
 Superconductivity in a Mesoscopic Loop of Finite Width." Submitted to
 the Proc. of the First Euroconf. on Vortex Matter in Superconductors,
 Crete, Greece, Sept. 18-24, 1999. E-mail
 <a href="mailto:vital.bruyndoncx@fys.kuleuven.ac.be">vital.bruyndoncx@fys.kuleuven.ac.be,</a> preprint available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9910473">http://xxx.lanl.gov/abs/cond-mat/9910473.</a>
<p>
 D. M. Bubb and J. F. Federici, "Cellular Automata Model for Persistent
 Photoconductivity in YBCO." Submitted to J. Phys. Cond. Matter.
 Department of Applied Physics, New Jersey Institute of Technology,
 University Heights, Newark, NJ 07102; e-mail <a href="mailto:dmb8027@megahertz.njit.edu">dmb8027@megahertz.njit.edu</a>
 or <a href="mailto:bubb-danny@home.com">bubb-danny@home.com.</a> 72.40.+w; 73.50.Pz; 74.25.Gz; 74.72.Bk.
<p>
 N. Bulut, "Inelastic Neutron Scattering Peak in Zn Substituted
 YBa2Cu3O7." Department of Mathematics, Koc University, Istinye, 80860
 Istanbul, TURKEY; e-mail <a href="mailto:nbulut@ku.edu.tr">nbulut@ku.edu.tr;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9908266">http://xxx.lanl.gov/abs/cond-mat/9908266.</a> 74.62.Dh; 74.72.Bk; 75.10.Lp;
 74.25.-q.
<p>
 A. I. Buzdin, A. V. Vedyayev, and N. V. Ryzhanova, "Spin-Orientation
 Dependent Superconductivity in F/S/F Structures." Submitted to
 Europhys. Lett. Centre de Physique Theorique et de Modelisation,
 Universite Bordeaux I, CNRS-URA 1537, F-33405 Talence Cedex, FRANCE; e-
 mail <a href="mailto:buzdin@pth.u-bordeaux.fe">buzdin@pth.u-bordeaux.fe.</a> 74.80.Dm; 74.50.+r.
<p>
 B. Chen, Y. Zhao, D. P. Feng, C. F. Yang, C. C. Sorrell, G. D. Gu, and
 N. Koshizuka, "XPS Studies of High-Tc Superconducting Bi2Sr2Ca(Cu1-
 yFey)2Ox Single Crystals." To be published in Physica C (in press).
 Contact Y. Zhao, Superconductivity Research Group, School of Materials
 Science and Engineering, University of New South Wales, P.O. Box 1,
 Sydney 2052 NSW, AUSTRALIA; telephone +61 2 9385 5986; telefax +61 2
 9385 5956; e-mail <a href="mailto:y.zhao@unsw.edu.au">y.zhao@unsw.edu.au.</a> Key words: XPS, Bi2Sr2Ca(Cu1-
 yFey)2Ox, single crystals.
<p>
 Qijin Chen, Ioan Kosztin, and K. Levin, "Unusual Thermodynamical and
 Transport Signatures of Short Coherence Length Superconductors: A BCS
 Bose-Einstein Crossover Approach." James Franck Institute, University
 of Chicago, 5640 South Ellis Avenue, Chicago, IL 60637; e-mail
 <a href="mailto:qchen@rainbow.uchicago.edu">qchen@rainbow.uchicago.edu;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9908362">http://xxx.lanl.gov/abs/cond-mat/9908362.</a> 74.20.-z; 74.25.Bt; 74.25.Fy;
 74.25.Nf.
<p>
 Mark W. Coffey, "Inverse Magnetic Force Microscopy of Superconductors in
 Half-Space Geometry." To be published in J. Appl. Phys. Department of
 Physics, University of Colorado, Boulder, CO 80309; e-mail
 <a href="mailto:mcoffey@stripe.colorado.edu">mcoffey@stripe.colorado.edu.</a>
<p>
 F. Cordero, R. Cantelli, and M. Ferretti, "Tunneling Driven Tilt Modes
 of the O Octahedra in La2-xSrxCuO4: Strong Dependence on Doping."
 Submitted to Phys. Rev. B. E-mail <a href="mailto:cordero@idac.rm.cnr.it">cordero@idac.rm.cnr.it,</a> preprint
 available at <a href="http://xxx.lanl.gov/abs/cond-mat/9910402">http://xxx.lanl.gov/abs/cond-mat/9910402.</a>
<p>
 T. Doderer, C. C. Tsuei, W. Hwang, and D. M. Newns, "Charge Transport in
 the Normal State of Electron or Hole Doped YBa2Cu3O7-x." Institute of
 Solid State Physics, Friedrich-Schiller-University, Helmholtzweg 5, D-
 07743 Jena, GERMANY. 74.72.Bk; 71.30.+h; 72.20.Ee; 85.30.Tv.
<p>
 Tamio Endo, Ken-ichi Itoh, Jiro Yamada, Masaki Tada, Akinori Hashizume,
 Morihiro Sugiyama, and Kinji Watabe, "a-c Phase Orientation in Thin Film
 Growth of YBa2Cu3Ox in Higher Temperature Region." Presented at the
 12th Int. Symp. on Superconductivity (ISS'99), Morioka, Japan, Oct. 17-
 19, 1999. Faculty of Engineering, Mie University, Kamihama, Tsu, Mie
 514-8507, JAPAN; telephone +81 59 231 9400; telefax +81 59 231 9471; e-
 mail <a href="mailto:endo@cm.elec.mie-u.ac.jp">endo@cm.elec.mie-u.ac.jp.</a> Key words: YBa2Cu3Ox film growth,
 orientation of a-c phase, thermal effects, oxygen plasma.
<p>
 H. M. Fretwell, A. Kaminski, J. Mesot, J. C. Campuzano, M. R. Norman, M.
 Randeria, T. Sato, R. Gatt, T. Takahashi, and K. Kadowaki, "The Fermi
 Surface of Bi2Sr2CaCu2O8." Department of Physics, University of Wales
 Swansea, Singleton Park, Swansea SA2 8PP, UNITED KINGDOM; telephone +44
 1792 295323; telefax +44 1792 295324; M. R. Norman's e-mail at Argonne
 National Laboratory <a href="mailto:norman@hexi.msd.anl.gov">norman@hexi.msd.anl.gov;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9910221">http://xxx.lanl.gov/abs/cond-mat/9910221.</a> 71.25.Hc; 74.25.Jb; 74.72.Hs;
 79.60.Bm.
<p>
 K. Frikach, M. Poirier, M. Castonguay and K. D. Truong, "Elastic Study
 of Antiferromagnetic Fluctuations in the Layered Organic Superconductors
 kappa-(BEDT-TTF)2x." M. Poirier's e-mail <a href="mailto:poirier@physique.usherb.ca">poirier@physique.usherb.ca,</a>
 preprint available at <a href="http://xxx.lanl.gov/abs/cond-mat/9911057">http://xxx.lanl.gov/abs/cond-mat/9911057.</a>
<p>
 E. Goldobin and A. V. Ustinov, "Neighbor-Junction State Effect on the
 Fluxon Motion in a Josephson Stack." Submitted to Phys. Rev. B.
 Institute of Thin Film and Ion Technology, Research Center Juelich GmbH
 (FZJ), D-52425 Juelich, GERMANY; e-mail <a href="mailto:e.goldobin@fz-juelich.de">e.goldobin@fz-juelich.de;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/9910489">http://xxx.lanl.gov/abs/cond-mat/9910489.</a>
 74.50.+r; 74.80.Dm; 85.25.Dq.
<p>
 E. Goldobin, A. Wallraff, and A. V. Ustinov, "Cherenkov Radiation from
 Fluxon in a Stack of Coupled Long Josephson Junctions." Submitted to
 JLTP. Institute of Thin Film and Ion Technology, Research Center
 Juelich GmbH (FZJ), D-52425 Juelich, GERMANY; e-mail <a href="mailto:e.goldobin@fz-">e.goldobin@fz-</a>
 juelich.de; preprint also available at <a href="http://xxx.lanl.gov/abs/cond-">http://xxx.lanl.gov/abs/cond-</a>
 mat/9910234. 74.50.+r; 74.80.Dm; 85.25.Dq; 41.60.Bq.
<p>
 J. Goryo, "Vortex in Chiral Superconducting State." To be published in
 the Proc. of the Int. Conf. on Recent Progress in Many Body Theories X,
 Seattle, Wash., Sept. 10-15, 1999. E-mail
 <a href="mailto:goryo@particle.sci.hokudai.ac.jp">goryo@particle.sci.hokudai.ac.jp,</a> preprint available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9911082">http://xxx.lanl.gov/abs/cond-mat/9911082.</a>
<p>
 Yizong He, Fang Zhou, and Z. X. Zhao, "Contamination by Alumina Crucible
 and the Effect of Al on Tc for Bi-2212 Single Crystals." 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; e-mail
 <a href="mailto:yzhe@ssc.iphy.ac.cn">yzhe@ssc.iphy.ac.cn.</a> Key words: Bi-2212 crystal growth, alumina
 crucible contamination, effect of Al on Tc, superconductivity.
<p>
 F. Hebert, G. G. Batrouni, H. Mabilat, "Exact Duality and Dual Monte-
 Carlo Simulation for the Bosonic Hubbard Model." G. G. Batrouni's e-
 mail <a href="mailto:batrouni@su2.inln.cnrs.fr">batrouni@su2.inln.cnrs.fr,</a> preprint available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9911002">http://xxx.lanl.gov/abs/cond-mat/9911002.</a>
<p>
 T. Hughes, F. Darmann, J. Horvat, and S. X. Dou, "Reduction of the ac
 Losses in Ag Sheathed PbBi2223 Tapes with Twisted Filaments." To be
 published in Physica C (in press). Institute for Superconducting and
 Electronic Materials, University of Wollongong, Wollongong NSW 2522,
 AUSTRALIA; telephone +61 2 4221 5766; telefax +61 2 4221 5731; e-mail
 <a href="mailto:thuges@uow.edu.au">thuges@uow.edu.au.</a> Key words: ac losses, twisted filaments, coupling
 losses.
<p>
 Yasushi Idemoto, Yoshihisa Hayakawa, Nobuyuki Koura, James W.
 Richardson, Jr., and Chun-Keung Loong, "Oxygen-Content Dependence of
 Crystal Structure and Tc of (Nd0.675Ce0.325)2(Ba0.664Nd0.336)2Cu3.00Oy."
 To be published in Physica C. Department of Industrial Chemistry,
 Faculty of Science and Technology, Science University of Tokyo, 2641
 Yamazaki, Noda-shi, Chiba 278-8510, JAPAN; telephone +81 471 24 1501,
 ext. 3600; telefax +81 471 25 7761; e-mail <a href="mailto:idemoto@ci.noda.sut.ac.jp">idemoto@ci.noda.sut.ac.jp.</a>
 Key words: oxygen content, neutron diffraction, crystal structure, Cu
 valence, Ce valence. 74.25.-q; 74.62.Bf; 74.62.Dh; 74.72.Jt.
<p>
 Ken-ichi Itoh, Akinori Hashizume, Masaki Tada, Jiro Yamada, V. V.
 Srinivasu, Masanori Ashida, Tatsuo Itoh, and Tamio Endo, "Sensitive
 Detection of Liquid Nitrogen Temperature Fluctuation Induced by Bubbling
 using HTS Microwave Absorption." Presented at the 12th Int. Symp. on
 Superconductivity (ISS'99), Morioka, Japan, Oct. 17-19, 1999. Contact
 Tamio Endo, Faculty of Engineering, Mie University, Kamihama, Tsu, Mie
 514-8507, JAPAN; telephone +81 59 231 9400; telefax +81 59 231 9471; e-
 mail <a href="mailto:endo@cm.elec.mie-u.ac.jp">endo@cm.elec.mie-u.ac.jp.</a> Key words: microwave absorption in HTS,
 large fluctuating signal, liquid nitrogen bubbling, temperature
 fluctuation.
<p>
 M. Jahan-Miri, "Superconductivity and Magnetism at Nuclear-Matter
 Densities: An Astronomical Challenge." Presented at the First Regional
 Conf. on Magn. and Supercond. Mater. (MSM-99), Tehran, Iran, Sept. 27-
 30, 1999. E-mail <a href="mailto:jahan@sultan.iasbs.ac.ir">jahan@sultan.iasbs.ac.ir,</a> preprint available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9911026">http://xxx.lanl.gov/abs/cond-mat/9911026.</a>
<p>
 Shakeel Khan, Arti Singh, and R. J. Singh, "EPR Study of
 La1.854Sr0.146CuO4." To be published in Physica C (in press). Contact
 Arti Singh, Department of Physics, Aligarh Muslim University, Aligarh
 202002, INDIA; telephone +91 57 140 1001; e-mail <a href="mailto:phr001@amu.up.nic.in">phr001@amu.up.nic.in.</a>
 Key words: EPR, spin clusters, quantum stripes, high-Tc
 superconductors. 75.10.Dg.
<p>
 A. Yu. Kidiyarova-Shevchenko, D. E. Kirichenko, Z. Ivanov, F.
 Komissinsky, E. A. Stepancov, M. M. Khapaev, and T. Claeson, "Single
 Flux Quantum Comparators for HTS AD Converters." To be published in
 Physica C (in press). Contact Z. Ivanov, Chalmers University of
 Technology, S-41296 Goeteborg, SWEDEN. Key words: comparators, RSFQ,
 HTS superconductors, AD converters.
<p>
 Chang-Hoon Kim, Kug-Sun Hong, In-Tae Kim, Taek-Sang Hahn, and Sang-Sam
 Choi, "Comparison of Microstructures of Pulsed Laser Deposited
 YBa2Cu3O7-d Thin Films Using Solid-State Sintered and Modified Melt-
 Textured Grown Targets." To be published in Physica C (in press).
 Superconductivity Research Laboratory, Korea Institute of Science and
 Technology, P.O. Box 131, Seoul 130-650, SOUTH KOREA; telephone +82 2
 958 5727; telefax +82 2 958 5789; e-mail <a href="mailto:chang@kistmail.kist.re.kr">chang@kistmail.kist.re.kr.</a> Key
 words: YBa2Cu3O7-d, target, solid-state sintering, modified melt-
 textured growth, a-axis outgrowth. 61.16.Bg; 68.55.Jk; 81.15.Fg.
<p>
 T. K. Kopec and Jorge V. Jose, "Three-Dimensional Josephson-Junction
 Arrays in the Quantum Regime." Submitted to Phys. Rev. Lett. Institute
 for Low Temperature and Structure Research, Polish Academy of Sciences,
 P.O. Box 1410, 50-950 Wroclaw, POLAND; Jorge V. Jose's e-mail at
 Northeastern University, Boston, Mass. <a href="mailto:jose@citlalli7.physics.neu.edu">jose@citlalli7.physics.neu.edu;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/9910222">http://xxx.lanl.gov/abs/cond-mat/9910222.</a>
 67.40.Db; 73.23.Hk.
<p>
 V. M. Krasnov, "In-Plane Fluxon in Layered Superconductors with
 Arbitrary Number of Layers." Department of Microelectronics and
 Nanoscience, Chalmers University of Technology, S-41296 Goeteborg,
 SWEDEN; telephone +46 31 772 3397; telefax +46 31 772 3471; e-mail
 <a href="mailto:krasnov@fy.chalmers.se">krasnov@fy.chalmers.se;</a> Web site <a href="http://fy.chalmers.se/~krasnov/">http://fy.chalmers.se/~krasnov/;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/9910115">http://xxx.lanl.gov/abs/cond-mat/9910115.</a>
<p>
 B. Leridon, A. Defossez, J. Dumont, and J. P. Contour, "Transport
 Measurements in YBa2Cu3O7-d/PrBa2Cu3-xGaxO7-d Superlattices:
 Experimental Evidence for Underdoping." To be published in Physica C
 (in press). Laboratoire de Physique du Solide, Ecole Superieure de
 Physique et Chimie Industrielles (ESPCI), 10 rue Vauquelin, F-75231
 Paris Cedex 05, FRANCE; telephone +33 14 079 4483; telefax +33 14 079
 4425; e-mail <a href="mailto:brigitte.leridon@espci.fr">brigitte.leridon@espci.fr.</a> Key words: superlattice,
 underdoping, pulsed laser deposition.
<p>
 F. Licci, M. Marezio, Q. Huang, A. Santoro, C. Bougerol-Chaillout, and
 R. Masini, "Synthesis, Structure and Superconductivity of
 Hg0.75Mo0.25Ba2CuO4+d." To be published in Physica C (in press).
 Istituto Materiali Speciali per Elettronica e Magnetismo del Consiglio
 Nazionale delle Ricerche, Parco Arpea delle Scienze 37A, I-43010
 Fontanini, Parma, ITALY; telephone +39 0521 269204; telefax +39 0521
 269206; e-mail <a href="mailto:licci@maspec.bo.cnr.it">licci@maspec.bo.cnr.it.</a> Key words: mercury
 superconductors, molybdenum substitution, structure refinement,
 synthesis. 74.72.Gr; 74.62.Bf; 74.62.Dh.
<p>
 A. V. Lopatin, "On the Abrikosov Transition in Disordered
 Superconducting Films." Department of Physics, Rutgers University,
 Piscataway, NJ 08855; e-mail <a href="mailto:lopatin@pion.rutgers.edu">lopatin@pion.rutgers.edu;</a> preprint also
 available at <a href="http://xxx.lanl.gov/abs/cond-mat/9910020">http://xxx.lanl.gov/abs/cond-mat/9910020.</a>
<p>
 J. Lorenzana, "Instability Due to Long Range Coulomb Interaction in a
 Liquid of Polarizable Particles." E-mail <a href="mailto:jose.lorenzana@roma1.infn.it">jose.lorenzana@roma1.infn.it,</a>
 preprint available at <a href="http://xxx.lanl.gov/abs/cond-mat/9911105">http://xxx.lanl.gov/abs/cond-mat/9911105.</a>
<p>
 J. Lorenzana, J. Eroles, and S. Sorella, "Does the Heisenberg Model
 Describe the Multimagnon Spin Dynamics in Antiferromagnetic CuO Layers?"
 To be published in Phys. Rev. Lett. J. Eroles' e-mail
 <a href="mailto:eroles@viking.lanl.gov">eroles@viking.lanl.gov,</a> preprint available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9911037">http://xxx.lanl.gov/abs/cond-mat/9911037.</a>
<p>
 S. Lupi, P. Maselli, M. Capizzi, P. Calvani, P. Giura, and P. Roy,
 "Evolution of a Polaron Band Through the Phase Diagram of Nd2-xCexCuO4-
 y." To be published in Phys. Rev. Lett. Istituto Nazionale di Fisica
 della Materia (INFM), Dipartimento di Scienze Fisica, Universita di Roma
 "La Sapienza," Piazzale A. Moro 2, I-00185 Rome, ITALY; e-mail
 <a href="mailto:paolo.calvani@roma1.infn.it">paolo.calvani@roma1.infn.it;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9910102">http://xxx.lanl.gov/abs/cond-mat/9910102.</a> 74.25.Gz; 74.72.-h; 74.25.Kc.
<p>
 Peter Majewski, Andre Aubele, Torsten Fahr, and Fritz Aldinger,
 "Diffusion of Cu into the Ag Sheath of BPSCCO Tapes." To be published
 in Physica C (in press). Pulvermetallurgisches Laboratorium, Max-
 Planck-Institut fuer Metallforschung, Heisenbergstrasse 5, D-70569
 Stuettgart, GERMANY; telephone +49 711 6861 127; telefax +49 711 6861
 131; e-mail <a href="mailto:majewski@aldix.mpi-stuttgart.mpg.de">majewski@aldix.mpi-stuttgart.mpg.de.</a> Key words: Cu, Ag
 sheath, BPSCCO tapes.
<p>
 Andrew M. Martin and James F. Annett, "Phase Slips and Interfaces in d-
 Wave Superconductors." Department de Physique Theorique, Universite de
 Geneve, CH-1211 Geneve 4, SWITZERLAND; e-mail <a href="mailto:martin@serifos.unige.ch">martin@serifos.unige.ch;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/9910208">http://xxx.lanl.gov/abs/cond-mat/9910208.</a>
 74.50.+r; 74.60.Jg; 74.80.-g.
<p>
 Andrew M. Martin, Thomas Gramespacher and Markus Buttiker, "Charge
 Fluctuations in the Edge States of N-S Hybrid Nano-Structures." E-mail
 <a href="mailto:martin@serifos.unige.ch">martin@serifos.unige.ch,</a> preprint available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9911076">http://xxx.lanl.gov/abs/cond-mat/9911076.</a>
<p>
 O. V. Misochko, K. Kisoda, K. Sakai, and S. Nakashima, "Dynamics of Low-
 Frequency Phonons in the YBa2Cu3O7-x Superconductor Studied by Time- and
 Frequency-Domain Spectroscopies." To be published in Phys. Rev. B.
 Communications Research Laboratory, Kansai Advanced Research Center,
 588-2 Iwaoka, Hyogo 651-2401, JAPAN; telephone +81 78 969 2197; telefax
 +81 78 969 2154; e-mail <a href="mailto:misochko@crl.go.jp">misochko@crl.go.jp.</a> 74.72.Bk; 78.47.+p;
 74.76.Bz; 74.25.Kc.
<p>
 O. V. Misochko, E. Sakai, and S. Nakashima, "Femtosecond Pump-Probe
 Study of YBa2Cu4O8 Superconductor." To be published in Physica C.
 Communications Research Laboratory, Kansai Advanced Research Center,
 588-2 Iwaoka, Hyogo 651-2401, JAPAN; telephone +81 78 969 2197; telefax
 +81 78 969 2154; e-mail <a href="mailto:misochko@crl.go.jp">misochko@crl.go.jp.</a> Key words: high-Tc
 superconductors, femtosecond time-resolved spectroscopy, lattice
 dynamics. 74.25.Kc; 74.25.Gz; 74.72.Bk.
<p>
 A. Mourachkine, "Phenomenological Model of High-Tc Superconductivity: A
 MCS Model." E-mail <a href="mailto:anmourac@ulb.ac.be">anmourac@ulb.ac.be,</a> preprint available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9910449">http://xxx.lanl.gov/abs/cond-mat/9910449.</a>
<p>
 M.T.D. Orlando, A. Sin, F. Alsina, A. G. Cunha, N. Mestres, A. Calleja,
 S. Pinol, F. G. Emmerich, L. G. Martinez, M. Segarra, X. Obradors, and
 E. Baggio-Saitovitch, "Effects of Re-Doping on Superconducting
 Properties and Formation of Hg-1223 Superconductors." To be published
 in Physica C (in press). Contact A. Sin, Laboratoire de
 Cristallographie, Centre National de la Recherche Scientifique (CNRS),
 25 Avenue des Martyrs, BP 166, F-38042 Grenoble Cedex 9, FRANCE;
 telephone +33 4 76 8810; telefax +33 4 76 88 1038; e-mail
 <a href="mailto:xicola@labs.polycnrs-gre.fr">xicola@labs.polycnrs-gre.fr.</a> Key words: Hg-based superconductors.
 74.72.Gr.
<p>
 Youngho Park and Shoudan Liang, "Charge and Spin Dynamics of the Hubbard
 Chains." To be published in Physica C (in press). Institute of
 Physics, Academia Sinica, Nankang, Taipei 11529, Taiwan, REPUBLIC OF
 CHINA; telephone +886 2 278 99687; telefax +886 2 278 34187; e-mail
 <a href="mailto:yhpark83@hotmail.com">yhpark83@hotmail.com.</a> Key words: Hubbard chains, charge-spin
 separation, DMRG, recursion technique. 71.27.+a; 75.10.-b.
<p>
 Yu. G. Pashkevich and A. E. Filippov, "Charge Ordering, Phase Separation
 and Charge Pairing in Layered 3D Systems." Preprint #DonPTI-99-YGP-01.
 Donetsk Phystech, National Academy of Sciences of Ukraine, 340114
 Donetsk, UKRAINE; e-mail <a href="mailto:pashkevi@kinetic.ac.donetsk.ua">pashkevi@kinetic.ac.donetsk.ua;</a> preprint also
 available at <a href="http://xxx.lanl.gov/abs/cond-mat/9910317">http://xxx.lanl.gov/abs/cond-mat/9910317.</a> 71.10.-w;
 71.10.Li; 71.30.+h; 71.45.-d; 72.15.Rn; 05.30.Fk.
<p>
 S. Patnaik, R. C. Budhani, and Drew W. Hazelton, "Anisotropy Dominated
 Radio Frequency Vortex Dynamics in Bi2Sr2CaCu2O8 Thick Film on Silver
 Tapes." To be published in Physica C (in press). Contact R. C.
 Budhani, Department of Physics, Indian Institute of Technology Kanpur,
 Kanpur 208 016, INDIA. Key words: Bi2Sr2CaCu2O8 film, silver tapes,
 vortex dynamics.
<p>
 F. M. Peeters, V. A. Schweigert, B. J. Baelus, and P. S. Deo, "Vortex
 Matter in Mesoscopic Superconducting Disks and Rings." To be published
 in Physica C: Proc. of the First Euroconf. on Vortex Matter in
 Superconductors, Crete, Greece, Sept. 18-24, 1999. Departement
 Natuurkunde, Universiteit Antwerpen (UIA), Universiteitsplein 1, B-2610
 Antwerpen, BELGIUM; e-mail <a href="mailto:peeters@uia.ua.ac.be">peeters@uia.ua.ac.be;</a> preprint also available
 at <a href="http://xxx.lanl.gov/abs/cond-mat/9910172">http://xxx.lanl.gov/abs/cond-mat/9910172.</a> Key words:
 superconductivity, vortex, flux quantization.
<p>
 G. Plesch, G. Gritzner, M. Jergel, C. Falcony, A. Buckuliakova, F.
 Hanic, and V. Strbik, "Tl-Based High-Tc Superconducting Films Prepared
 by Aerosol Deposition." Presented at the First Int. Conf. on Inorg.
 Mater. -- Synthesis, Characterization, Properties and Applications of
 Inorganic Materials, Palais des Congres de Versailles, France, Sept. 16-
 19, 1998; to be published in Int. J. Inorg. Mater. Department of
 Inorganic Chemistry, Faculty of Natural Sciences, Comenius University,
 842 15 Bratislava, SLOVAKIA; telephone +421 7 60296 326; telefax +421 7
 60296 273; e-mail <a href="mailto:plesch@fns.uniba.sk">plesch@fns.uniba.sk.</a> Key words: Tl-based
 superconductors, films, aerosol spray deposition, thermogravity.
<p>
 A. K. Pradhan, B. Chen, S. Shibata, K. Kuroda, K. Nakao, T. Machi, and
 N. Koshizuka, "Observation of the Vortex-Glass and the Melting
 Transitions in NdBa2Cu3O7-y Single Crystals Grown by Different Methods."
 To be published in Supercond. Sci. & Technol. Superconductivity
 Research Laboratory, International Superconductivity Technology Center
 (ISTEC), 10-13 Shinonome 1-chome, Koto-ku, Tokyo 135-0062, JAPAN;
 telefax +81 3 3536-5714 or -5717; e-mail <a href="mailto:pradhan@istec.or.jp">pradhan@istec.or.jp.</a>
<p>
 B. C. Prorok, J. H. Park, K. C. Goretta, U. Balachandran, and M. J.
 McNallan, "Hardness and Microstructure of Internally Oxidized Silver
 Alloys." Presented at the 16th Annual Conf. on Magnet Technology, Ponte
 Vedra Beach, Fla., Sept. 27 - Oct. 2, 1999. Contact Janice Coble,
 Materials Science Division, Argonne National Laboratory, 9700 South Cass
 Avenue, Argonne, IL 60439; telephone (630) 252-5497; telefax (630) 252-
 9595; e-mail <a href="mailto:coble@anl.gov">coble@anl.gov.</a> Key words: internal oxidation, Ag alloys,
 high-temperature superconductors.
<p>
 J. J. Rabbers, O. van der Meer, W.F.A. Klein Zeggelink, O. A.
 Shevchenko, B. ten Haken, and H.H.J. ten Kate, "Magnetization Loss of
 BSCCO/Ag Tape in Uni-Directional and Rotating Magnetic Field." To be
 published in Physica C (in press). Faculty of Applied Physics, Low
 Temperature Division, University of Twente, P.O. Box 217, 7500 AE
 Enschede, THE NETHERLANDS; telephone +31 53 489 3889; telefax +31 53 489
 1099; e-mail <a href="mailto:j.j.rabbers@tn.utwente.nl">j.j.rabbers@tn.utwente.nl.</a> Key words: BSCCO/Ag tape, ac
 loss, rotating magnetic field, ac magnetic field, magnetization loss.
<p>
 X. S. Rao, C. K. Ong, B. B. Jin, C. Y. Tan, S. Y. Xu, P. Chen, J. Li,
 and Y. P. Feng, "Anomalous Microwave Response of High-Temperature
 Superconducting Thin-Film Microstrip Resonator in Weak dc Magnetic
 Fields." To be published in Physica C (in press). Center for
 Superconducting and Magnetic Materials and Department of Physics,
 National University of Singapore, Singapore 119260, SINGAPORE; telephone
 +65 874 2615; telefax +65 777 6126; e-mail <a href="mailto:scip7099@leonis.nus.edu.sg">scip7099@leonis.nus.edu.sg;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/9908429">http://xxx.lanl.gov/abs/cond-mat/9908429.</a>
 Key words: surface impedance, high-temperature superconducting thin
 film, nonlinearity. 74.25.Nf; 74.76.Bz; 74.60.Ge; 74.60.Ec.
<p>
 Jonathan Reading and Mark T. Weller, "Powder Neutron Diffraction
 Structural Analysis of the Lanthanide Barium Copper Oxyborates,
 LnBaCuO2BO3 (Ln = La, Pr and Nd)." To be published in Physica C (in
 press). Contact Mark T. Weller, Department of Chemistry, University of
 Southampton, Southampton SO17 1BJ, UNITED KINGDOM; telephone +44 1703
 593592; telefax +44 1703 593592; e-mail <a href="mailto:mtw@soton.ac.uk">mtw@soton.ac.uk.</a> Key words:
 neutron diffraction, borate, lanthanide.
<p>
 N. Savvides, S. Gnanarajan, A. Thorley, A. Katsaros, J. Herrmann, K.-H.
 Mueller, and R. Clissold, "YBCO Coated Tapes Fabricated by Magnetron
 Deposition." Presented at the Fourth European Conf. on Appl. Supercond.
 (EUCAS'99), Barcelona, Spain, Sept. 14-17, 1999. CSIRO
 Telecommunications and Industrial Physics, Bradfield Road, West
 Lindfield, P.O. Box 218, Lindfield NSW 2070, AUSTRALIA; telefax +61 2
 9413 7202; e-mail <a href="mailto:nick.savvides@tip.csiro.au">nick.savvides@tip.csiro.au.</a>
<p>
 S. I. Schlachter, W. H. Fietz, K. Grube, Th. Wolf, B. Obst, P. Schweiss,
 and M. Klaeser, "The Effect of Chemical Doping and Hydrostatic Pressure
 on Tc of Y1-yCayBa2Cu3Ox Single Crystals." To be published in Physica C
 (in press). ITP Forschungszentrum Karlsruhe, Institut fuer Technische
 Physik, Postfach 3640, D-76021 Karlsruhe, GERMANY; telephone +49 7247 82
 3554; telefax +49 7247 82 2849; e-mail <a href="mailto:sonja.schlachter@itp.fzk.de">sonja.schlachter@itp.fzk.de.</a> Key
 words: high-Tc superconductor, charge transfer, doping, oxygen order,
 high pressure. 74.62.-c; 74.62.Fj; 74.62.Dh; 74.72.Bk.
<p>
 V. A. Schweigert and F. M. Peeters, "Transitions Between Different
 Superconducting States in Mesoscopic Disks." To be published in Physica
 C. Departement Natuurkunde, Universiteit Antwerpen (UIA),
 Universiteitsplein 1, B-2610 Antwerpen, BELGIUM; F. M. Peeter's e-mail
 <a href="mailto:peeters@uia.ua.ac.be">peeters@uia.ua.ac.be;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9910110">http://xxx.lanl.gov/abs/cond-mat/9910110.</a> Key words:
 superconductivity, mesoscopics, vortex.
<p>
 A. Sin, L. Fabrega, M.T.D. Orlando, A. G. Cunha, S. Pinol, E. Bagio-
 Saitovich, and X. Obradors, "Improvement of Superconducting (Hg,Re)-1223
 Ceramics Synthesized by the Sealed Quartz Tube Technique." To be
 published in Physica C (in press). Laboratoire de Cristallographie,
 Centre National de la Recherche Scientifique (CNRS), 25 Avenue des
 Martyrs, BP 166, F-38042 Grenoble Cedex 9, FRANCE; telephone +33 4 76 88
 7803; telefax +33 4 76 88 1038; e-mail <a href="mailto:xicola@labs.polycnrs-gre.fr">xicola@labs.polycnrs-gre.fr.</a> Key
 words: Hg-based superconductors, phase diagram. 74.72.Gr.
<p>
 I. V. Stasyuk, A. M. Shvaika, and K. V. Tabunshchyk, "Self-Consistent
 Approach for Thermodynamics of a Simplified Pseudospin-Electron Model."
 K. V. Tabunshchyk's e-mail <a href="mailto:tkir@icmp.lviv.ua">tkir@icmp.lviv.ua,</a> preprint available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9910523">http://xxx.lanl.gov/abs/cond-mat/9910523.</a>
<p>
 K. V. Tabunshchyk, "Thermodynamics of a Pseudospin-Electron Model." E-
 mail <a href="mailto:tkir@icmp.lviv.ua">tkir@icmp.lviv.ua,</a> preprint available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9911006">http://xxx.lanl.gov/abs/cond-mat/9911006.</a>
<p>
 Masaki Tada, Akinori Hashizume, Ken-ichi Itoh, Jiro Yamada, Hisatake
 Uchikawa, Kohichi Ogai, Tamio Endo, and Yasuo Tsutsumi, "Effects of
 Plasma Cleaning and Assist on Early Stage of Ca-Doped Bi2201 Thin Film
 Growth." Presented at the 12th Int. Symp. on Superconductivity
 (ISS'99), Morioka, Japan, Oct. 17-19, 1999. Contact Tamio Endo, Faculty
 of Engineering, Mie University, Kamihama, Tsu, Mie 514-8507, JAPAN;
 telephone +81 59 231 9400; telefax +81 59 231 9471; e-mail
 <a href="mailto:endo@cm.elec.mie-u.ac.jp">endo@cm.elec.mie-u.ac.jp.</a> Key words: Ca-doped Bi2201 thin film, plasma
 cleaning, plasma assist, early growth stage, multi-nucleation.
<p>
 S. Takahashi, H. Imamura, and S. Maekawa, "Spin Injection and
 Magnetoresistance in Ferromagnet/Superconductor/Ferromagnet Tunnel
 Junctions." Institute for Materials Research, Tohoku University, Sendai
 980-8577, JAPAN; H. Imamura's e-mail <a href="mailto:hima@imr.tohoku.ac.jp">hima@imr.tohoku.ac.jp;</a> preprint
 also available at <a href="http://xxx.lanl.gov/abs/cond-mat/9910388">http://xxx.lanl.gov/abs/cond-mat/9910388.</a>
<p>
 A. Vailionis, A. Brazdeikis, I. Bryntse, and A. S. Flodstroem, "Cation
 Disorder in Superconducting HgBa2CaCu2O6+d Films Prepared on SrTiO3
 Substrates." To be published in Physica C (in press). Coordinated
 Science Laboratory and Materials Research Laboratory, University of
 Illinois, Urbana, IL 61801; telephone (217) 333-5065; telefax (217) 244-
 1631; e-mail <a href="mailto:vailoni@uiuc.edu">vailoni@uiuc.edu.</a> Key words: Hg-based high-Tc
 superconductors, thin films, cation disorder. 74.76.Bz; 74.72.Gr;
 68.55.-a.
<p>
 M. J. Van Bael, L. Van Look, K. Temst, M. Lange, J. Bekaert, U. May, G.
 Guentherodt, V. V. Moshchalkov, and Y. Bruynseraede, "Flux Pinning by
 Regular Arrays of Ferromagnetic Dots." Submitted to Physica C: Proc.
 of the First Euroconf. on Vortex Matter in Superconductors, Crete,
 Greece, Sept. 18-24, 1999. L. Van Look's e-mail
 <a href="mailto:lieve.vanlook@fys.kuleuven.ac.be">lieve.vanlook@fys.kuleuven.ac.be,</a> preprint available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9911033">http://xxx.lanl.gov/abs/cond-mat/9911033.</a>
<p>
 L. Van Look, M. J. Van Bael, K. Temst, J. G. Rodrigo, M. Morelle, V. V.
 Moshchalkov, and Y. Bruynseraede, "Flux Pinning in a Superconducting
 Film by a Regular Array of Magnetic Dots." Submitted to the Proc. of
 the First Euroconf. on Vortex Matter in Superconductors, Crete, Greece,
 Sept. 18-24, 1999. E-mail <a href="mailto:lieve.vanlook@fys.kuleuven.ac.be">lieve.vanlook@fys.kuleuven.ac.be,</a> preprint
 available at <a href="http://xxx.lanl.gov/abs/cond-mat/9910413">http://xxx.lanl.gov/abs/cond-mat/9910413.</a>
<p>
 D. T. Verebelyi, C. W. Schneider, Y.-K. Kuo, M. J. Skove, G. X. Tessema,
 and J. E. Payne, "Effect of Magnetic Substitutions (Ni, Co, Fe) for Cu
 on Thermal Conductivity of BiSCCO Whiskers." To be published in Physica
 C (in press). Oak Ridge National Laboratory, Oak Ridge, TN 37831-6061;
 telephone (423) 574-6264; telefax (423) 574-6263; e-mail <a href="mailto:vod@ornl.gov">vod@ornl.gov.</a>
 Key words: thermal conductivity, Bi-2212, BiSCCO, whiskers.
<p>
 Rongping Wang, Yueliang Zhou, Shaohua Pan, Meng He, Zhenghao Chen, and
 Guozhen Yang, "A New Direct Process to Prepare YBa2Cu3O7-d Films on
 Biaxially Textured Ag{110}<211>." To be published in Physica C (in
 press). Laboratory of Optical Physics, Institute of Physics and Center
 for Condensed Matter Physics, Chinese Academy of Sciences, Beijing
 100080, PEOPLE'S REPUBLIC OF CHINA; e-mail <a href="mailto:xyw@aphy.iphy.ac.cn">xyw@aphy.iphy.ac.cn.</a> Key
 words: superconducting tapes, textured growth, pulsed laser deposition.
 85.25.Kx; 68.55.Jk.
<p>
 J. O. Willis, D. E. Daney, M. P. Maley, H. J. Boenig, S. Fleshler, R.
 Mele, G. Coletta, M. Nassi, and J. R. Clem, "Multiphase Losses in HTS
 Prototype Multistrand Conductors." Submitted to the 12th Int. Symp. on
 Superconductivity (ISS'99), Morioka, Japan, Oct. 17-19, 1999. MST-STC,
 MS-K763, Los Alamos National Laboratory, Los Alamos, NM 87545; telephone
 (505) 665-1320; telefax (505) 665-3164; e-mail <a href="mailto:jwillis@lanl.gov">jwillis@lanl.gov.</a> Key
 words: ac losses, power transmission conductors, Bi-2223/Ag tapes.
<p>
 Z. Q. Yang, X. D. Su, G. W. Qiao, Y. C. Guo, S. X. Dou, and F. R. de
 Boer, "Flux Pinning Enhancement in Ag-Sheathed Bi-2223 Tapes by
 Nanometer SiC Addition." To be published in Physica C (in press). Van
 de Waals-Zeeman Institute, University of Amsterdam, Valckenierstraat 65,
 1018 XE Amsterdam, THE NETHERLANDS; telephone +31 20 5255 606; telefax
 +31 20 5255 788; e-mail <a href="mailto:zqyang@wins.uva.nl">zqyang@wins.uva.nl.</a> Key words: Bi-2223,
 nanometer SiC, flux pinning. 74.60.Ge.
<p>
 H. W. Zandbergen, E. Connolly, I. E. Graboy, V. L. Svetchnikov, and A.
 R. Kaul, "HREM Characterization of Interfaces in YBa2Cu3O7-d/CeO2/R-
 Al2O3 Structures." To be published in Physica C (in press). National
 Centre for HREM, Laboratory of Materials Science, Delft University of
 Technology, Rotterdamseweg 137, 2628 AL Delft, THE NETHERLANDS;
 telephone +31 15 278 2266; telefax +31 15 278 6730; e-mail
 <a href="mailto:zandbergen@stm.tudelft.nl">zandbergen@stm.tudelft.nl.</a> Key words: sapphire, antiphase boundary,
 lattice mismatch.
<p>
 B. Zeimetz, B. A. Glowacki, Y. S. Cheng, A. Kursumovic, E. Mendoza, X.
 Obradors, T. Puig, S. X. Dou, and J. E. Evetts, "Transport Critical
 Current Measurements in a Pressurized Liquid Nitrogen Vessel."
 Submitted to the Proc. of the Fourth European Conf. on Appl. Supercond.
 (EUCAS'99), Barcelona, Spain, Sept. 14-17, 1999; to be published in the
 Inst. of Physics Conf. Series. Department of Materials Science,
 Cambridge University, Pembroke Street, Cambridge CB2 3QZ, UNITED
 KINGDOM; telephone +44 1223 334375; telefax +44 1223 334373; e-mail
 <a href="mailto:bpz20@cam.ac.uk">bpz20@cam.ac.uk.</a>
<p>
 A. A. Zhukov, H. Kuepfer, P.A.J. de Groot, and T. Wolf, "Entropy Driven
 Fragmentation of the Locked Vortices in YBa2Cu3Oy Single Crystals."
 Submitted to Phys. Rev. Lett. Department of Physics and Astronomy,
 University of Southampton, Southampton SO17 1BJ, UNITED KINGDOM;
 telephone +44 1703 592077; telefax +44 1703 593910; e-mail
 <a href="mailto:aaz@phys.soton.ac.uk">aaz@phys.soton.ac.uk.</a> 74.60.Ge; 74.60.Jg; 74.72.Bk.
<p>
 <hr>
<p>
 COMING EVENTS
 (An * indicates a previously listed event. Also see complete listing of
 upcoming conferences and workshops at our Web site
 <a href="http://www.iitap.iastate.edu/htcu/comevents.html.)">http://www.iitap.iastate.edu/htcu/comevents.html.)</a>
<p>
 Dec. 7 - 10, 1999: 6th European Vacuum Conference (EVC 6), Institut de
 Physique Nucleaire (IPNL), Villeurbanne, France. EVC 6 will provide an
 overview of research, technology, and special applications in the field
 of vacuum technology. Program includes four sessions: design, vacuum
 production, vacuum control, and quality. For further information,
 contact SFV--19, Rue du Renard, F-75004 Paris, France; phone +33 1 5301
 9030; fax +33 1 4278 6320; e-mail <a href="mailto:sfv1@fd-online.net">sfv1@fd-online.net;</a> Web site
 <a href="http://www.espid">http://www.espid.</a> org/evc6/.
<p>
 *Feb. 20 - Feb. 25, 2000: Sixth International Conference on Materials
 and Mechanisms of Superconductivity and High Temperature Superconductors
 (M2S-HTSC-VI), George R. Brown Convention Center, Houston, Texas.
 Hosted by the Texas Center for Superconductivity at the University of
 Houston and sponsored by federal agencies and industry. Co-Chairs: C.
 W. Chu, W. K. Chu, and K. Salama. This series of meetings, established
 in 1988, is dedicated to superconductivity and related phenomena, and
 the host materials of these phenomena. The Conference will bring
 together members of the international low- and high-temperature
 superconductivity community to focus on recent insights into
 superconductor physics, materials, and devices. Emerging areas and
 future trends will also be highlighted. General conference topics
 include, but are not limited to, Experimental and Theoretical Studies of
 Superconducting Materials -- low temperature, high temperature,
 fullerite, heavy fermion, organic, and new; Physical Properties --
 mechanisms, magnetic, electrical, optical, thermal, mechanical, and
 acoustic; Synthesis and Processing -- thin films, superlattices, thick
 films, and bulk; and Applications -- small current (SQUIDs, junctions,
 microwave devices) and large current (cables, transformers, motors,
 generators, magnetic levitation devices). For information, contact M2S-
 HTSC-VI Conference Secretariat, Texas Center for Superconductivity,
 University of Houston, 3201 Cullen Boulevard, Houston, TX 77204-5932;
 telefax (713) 743-8216; Web site <a href="http://m2s-conf.uh.edu">http://m2s-conf.uh.edu.</a>
<p>
 March 4 - 7, 2000: International Workshop on Latest Developments in
 Low-Density and Low-Dimensional Electronic Systems, University of
 Florida, Department of Physics, Gainesville, Florida. Main theme of the
 workshop is the interplay between low dimensionality, low carrier
 density, and the transport and magnetic properties of novel materials.
 Program is organized in ascending dimension and includes the following
 topics: (0-D and 1-D) quantum dots, quantum wires, and nanotubes; (2-D)
 stripes in high-Tc materials, quantum Hall effect, metal-insulator
 transition at B=0, and superconductor-insulator transition; (3-D)
 itinerant ferromagnetism in low-density materials, magnetic field
 induced transitions, spin- and charge-density waves, and Kondo
 insulators. Special focus will be on the use of high magnetic fields at
 the National High Magnetic Field Laboratory in studies of low-density
 and low-dimensional materials. Invited talks and poster sessions.
 Application deadline, February 1, 2000. For information, contact Alan
 Dorsey, 2116 New Physics Bldg., Department of Physics, University of
 Florida, P.O. Box 118440, Gainesville, FL 32611-8440; telephone (352)
 392-4031; telefax (352) 392-0524; e-mail <a href="mailto:dorsey@phys.ufl.edu">dorsey@phys.ufl.edu;</a> Web-site
 <a href="http://www.phys.ufl.edu/workshops/ld3.html">http://www.phys.ufl.edu/workshops/ld3.html.</a>
<p>
 May 22 - June 2, 2000: NATO-ASI Modern Trends in Magnetostriction Study
 & Application, Kiev, Ukraine. Objectives: (1) to determine the state
 of the art of the basic and applied research of magnetostriction and
 related phenomena, (2) to define and prioritize directions of
 investigation for the future, (3) to consider new materials for common
 applications of magnetostriction-based devices, and (4) to formulate new
 perspectives on magnetostriction phenomena and applications, using
 advances in materials design and technology. Applications are invited
 from research students (financial support available) and from
 researchers (self-supported). For information, contact Institute for
 Low Temperature Physics & Engineering, 47 Lenin Avenue, 310164 Kharkov,
 Ukraine; telephone +380 572 321 223; telefax +380 572 322 370; e-mail
 <a href="mailto:ASI-2000@ilt.kharkov.ua">ASI-2000@ilt.kharkov.ua.</a>
<p>
 Sept. 17 - 22, 2000: The Applied Superconductivity Conference (ASC
 2000), Pavilion Convention Center, Virginia Beach, Virginia. Premier
 conference on applied superconductivity held every two years. The
 meeting will highlight the latest developments and will feature invited
 presentations that offer an exciting look into the future. Papers
 solicited in three general areas of superconductivity: large scale,
 materials, and electronics. Abstract deadline, February 11, 2000. All
 abstracts must be submitted electronically. Further information
 available at the Web site <a href="http://www.ascinc.org">http://www.ascinc.org.</a>
<p>
 <hr>
<p>
 RESOURCES
<p>
 Information
<p>
 New Book: Handbook of Superconductivity, by Charles K. Poole. The
 present volume is the first handbook to address this field and covers
 both "classic" supercon-ductivity-related topics and high Tc. Numerous
 properties including thermal, electrical, magnetic, mechanical, phase
 diagrams, and spectroscopic crystallographic structures are presented
 for many types of superconductors. Critical fields, critical currents,
 coherence lengths, penetration depths, and transition temperatures are
 tabulated. Key features: many data tables, crystallographic structures
 of over 100 superconductor types, summary of main results of several
 theories, and phase diagrams for synthesizing new superconductors.
 Publ. 1999; price $95; ISBN 0-12-561460-8. For orders, contact Academic
 Press, Inc., Order Fulfillment Department, 6277 Sea Harbor Drive,
 Orlando, FL 32887; e-mail <a href="mailto:apbcs@">apbcs@</a> harcourtbrace.com; Web site
 <a href="http://www.apcatalog.com/">http://www.apcatalog.com/.</a>
<p>
 <hr>
<p>
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 We wish to thank the following for their contribution/subscription
 donations to High-Tc Update. If you wish to help support the
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 to Sreeparna Mitra, Editor, High-Tc Update, A219 Physics, ISU, Ames, IA
 50011-3020. Donations can also be made by credit card. We are listing
 donations received since October 1, 1998.
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<p>
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<p>
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 (Also see front page masthead)
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 <hr>
<p>
 High-Tc Update is the high-Tc superconductivity information exchange
 newsletter. Please send 1) preprints, reprints, and other research
 reports; 2) descriptions of on-going work; 3) meeting announcements and
 summaries.
<p>
 The information contained herein is intended for limited distribution.
 Readers are expected to respect the rights of the authors.
<p>
 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
 E-mail: <a href="mailto:MITRA@AMESLAB.GOV">MITRA@AMESLAB.GOV</a>
 or <a href="mailto:MITRA@IASTATE.EDU">MITRA@IASTATE.EDU</a>
<p>
<p>
 Project Director/Editor: Sreeparna Mitra
 Science Editor: John R. Clem
 High-Tc Update, Vol. 13, #23, December 1, 1999.
 <hr>