Published for the Division of Materials Sciences, Office of Basic Energy Sciences, USDOE, under Contract W-7405-eng-82 with the Ames Laboratory, Iowa State University. Funded by DMS/BES/USDOE, ARPA, ONR, and other agencies, organizations, and individuals.

The High-Tc Update web page is located at the URL http://www.iitap.iastate.edu/htcu/htcu.html

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.

PLEASE READ: The electronic-mail version of High-Tc Update is generated from a Macintosh Microsoft Word file and turned into a text file that can be transferred electronically. Formatting commands, Greek symbols, diacritical marks, etc. are lost in this transformation. In order to improve the readability of the e-mail version, the newsletter staff add explanatory marks as needed to the text file. For example, a carat (10^5) indicates a superscript (ten to the fifth). A carat followed by a bracket (cm^[-2]) indicates everything within the brackets is superscripted (centimeter to the minus 2). A bracket followed by a carat ([18]^O) indicates everything before the carat is superscripted. An underline (M_i) indicates a subscript (M subscript i). Most Greek letters are spelled out (Delta, mu, tau, pi, Omega), although delta is left as "d." In most instances, easily recognizable formulas or units are left as they appear: Tc, Jc, YBa2Cu3O7, O2. Mu-m is changed to micrometers. Diacritical marks (accents, tildes, carats, etc.) are removed, but the German umlaut (e.g., a, o, or u with two dots over it) is changed into a, o, or u followed by e. If needed for clarity, hyphens are occasionally inserted between spelled-out Greek letters or symbols (ohm-cm, sin-theta).

NOTA BENE: Our Science Editor, John R. Clem, is on currently on travel. The following Nota Bene is contributed by Sreeparna Mitra, Project Director and Editor of High-Tc Update.

YBCO

Low-temperature thermal conductivity measurements in untwinned single crystals of YBa2Cu3O6.9 containing Zn impurities are reported by L. Taillefer (Montreal) et al. The authors present results that show evidence for the existence of zero-energy quasiparticles in YBa2Cu3O6.9 and validation of the basic theory of transport in unconventional superconductors. Observed universal behavior is in quantitative agreement with calculations for a gap function of d-wave symmetry.

To create effective columnar pinning centers in melt-textured YBCO superconductors, In-Gann Chen (National Cheng Kung) et al. have developed an internal uranium fission technique in which fine uranium particles are dispersed chemically in the sample and followed by neutron irradiation to trigger fission. Fission fragments with high kinetic energy create lattice displacements and act as pinning centers. Preliminary results yield Jc values of 8.6 x 10^4 A/cm^2. Chemical compatibility, uranium distribution, Tc, Jc (H,T) measurements, and residual radioactivity are discussed.

Another preprint by In-Gann Chen et al. discusses the top-seeded melt- texture processing technique for YBCO material. Properties of samples prepared by this method and correlation with other processing methods are discussed.

Using a detwinned YBa2Cu3O7 monocrystal and acoustic resonance spectroscopy, M. Lei (Los Alamos) et al. have measured internal friction Q^[-1] = Delta[f]/f_r through the superconductive transition temperature of 91 K, and present results for the first ten macroscopic resonance frequencies f_r. None of the modes show classic BCS-like behavior based on simple pairing, isotropic s-electron, or weak-coupling assumptions; moreover, every mode behaves differently suggesting a strongly anisotropic energy gap Delta[k]. Some modes show increasing Q^[-1] upon cooling below Tc, indicating either strong Fermi surface changes or lattice-relaxation mechanisms.

Bi Cuprates

A paper by F. Warmont (CRISMAT) et al. reports angle-resolved transport measurements in a Bi-2212 single crystal with inclined columnar defects created by 5.8 GeV Pb ion irradiation. The directional features become less pronounced as the field or temperature increases, and disappears completely above a crossover line which extrapolates at low fields to a temperature lower than Tc. This crossover is discussed in terms of a decorrelation of line vortices induced by thermal fluctuations.

Measurements of energy losses caused by an ac transport current in silver-sheathed multifilamentary Bi-2223 and monocore Tl-1223 tapes are reported in a preprint by M. Ciszek (Cambridge) et al. as a function of the magnitude and orientation of the applied external magnetic field.

The in-plane (rho_[ab]) and out-of-plane (rho_c) resistivitities of Bi2Sr2CaCu2O8+x films have been measured simultaneously in magnetic films parallel to the film c axis (B <= 1 T) by D. V. Livanov et al. (Moscow Institute). The rho_[ab] (T,B) and rho_c(T,B) curves are well described both above and below the zero-field critical temperature by fluctuation theory. However, both rho_[ab] and rho_c exhibit thermally activated behavior in the low-temperature region, where the I-V characteristics change from ohmic to nonohmic. The authors attribute this effect to a pinning-induced phase transition from a strongly fluctuating normal phase into a superconducting vortex-solid phase.

Other Cuprates

XPS measurements were used to determine the core level electronic structure of Tl-1212 epitaxial films in a preprint by R. P. Vasquez (JPL) et al. and comparisons made to Tl-2212 and Hg-1212. The authors conclude that the similarity of the Cu 2p3/2 spectra for Tl-1212 and Tl- 2212 indicates that the number of Tl-O layers has little effect on Cu-O bonding. However, the Tl-1212 and Hg-1212 Cu 2p3/2 signals exhibit differences which suggest that the replacement of Tl^[3+] with Hg^[2+] results in the decrease in the O 2p --> Cu 3d charge transfer energy. Differences in the valence band of Tl-1212, Tl-2212, and Hg-1212 are consistent with differences in the calculated Cu 3d and (Tl,Hg) 6s/5d partial density of states.

Enhanced grain growth and increased superconducting volume fraction have been observed in polycrystalline (Tl,Ba)(Sr,Ba)2Ca2Cu3Ox samples doped with micrometer-size LaAlO3 or LSAT (a solid solution of LaAlO3 and Sr2AlTaO6) particles in a paper by S. Wu (Cambridge) et al. The results suggest that a controlled growth of Tl-1223 grains with improved texture can be achieved using microparticle addition. Tc values and transition widths are not affected by the addition of the particles.

Chromium substituted Hg1-xCrxBa2CuO4+d compounds have been synthesized by O. Chmaissem (Argonne) et al. The authors report a decrease in Tc with increasing Cr content in as-synthesized samples. Attempts to adjust carrier concentration by post-annealing destroys superconductivity because the samples are metastable under ambient conditions.

A preprint by T. Tamura et al. (ISTEC) investigates the effect of an oxidizing atmosphere of the formation of the Pb-1223 phase under high pressure. The authors have successfully synthesized a nearly single phase Pb-1223 using a narrow range of nominal oxygen content of starting materials, and report Tc values of 109 K in as-prepared samples and 122 K in samples post-annealed in Ar.

Vortices

A preprint by J. R. Thompson et al. (Oak Ridge) et al. reports observation of a large peak in the vortex creep rate of YBa2Cu3O7-d crystals with columnar defects that appears at the crossover between a regime where vortices are well localized on columnar pins to a regime where vortex-vortex interactions dominate. Near this crossover, the current-dependent creep activation energy U(J) shows behavior indicating that creep proceeds via a variable-range vortex hopping mechanism.

The melting of a moving vortex lattice has been studied by D. Dominguez (Bariloche) et al. by using numerical simulations with the current- driven 3D XY model. The authors report a first-order phase transition even for large disorder when the corresponding equilibrium transition is continuous. The low-temperature phase is an anisotropic moving glass.

The magnetic response of granular high-temperature superconducting plates subjected to a dc bias magnetic field and an increasing field perpendicular to it is studied both experimentally and theoretically in a preprint by F. Perez-Rodriguez (Puebla) et al. Magnetization curves for a system of grains decoupled by the applied magnetic field in sintered slabs of YBa2Cu3O7-x and NdBa2Cu3O7-x are analyzed and compared with theoretical results based on the double critical-state model which accounts for both flux transport and flux-line-cutting effects.

The grain-size dependence of the magnetic field distributions in YBa2Cu3O7-d vortex states has been studied by C. Boekema (San Jose State) et al. The authors observe strong deviations from type-II BCS- like behavior.

Nonlocal corrections to the London model have been used by V. G. Kogan (Ames Lab-Iowa State) et al. to describe vortex lattices in LuNi2B2C. Within this scheme, in fields along the c axis, vortices form a square lattice at large fields, transform to a triangular form at a lower field H_2, and to another triangular lattice at a still lower field H_1. The authors argue that the transition at H_2 is second-order and that at H_1 is first-order. Neutron scattering data for ErNi2B2C are also discussed.

Theory

The specific-heat jump at normal-superconducting phase transition in an anisotropic superconductor with non-magnetic impurities is calculated in a paper by G. Haran et al. (Waterloo) within a weak-coupling mean-field approximation. Dependence on the impurity concentration is seen to be quite different for d_[x^2-y^2] wave and d_[x^2-y^2]+s wave states.

A phenomenological model for realizing the current-voltage (I-V) characteristics of a superconducting weak link is proposed in a paper by K. Saitoh et al. (ISTEC). The total bias current is decomposed into a part that obeys the resistively shunted junction (RSJ) type current voltage relation and one that obeys a flux-flow one. Results show good agreement with experimental data.

Various mixed s and d pairing models are compared in a preprint by M. T. Beal-Monod (Orsay) et al. for the orthorhombic Y-123 and Y-124 systems. The authors suggest new experiments for penetration depth measurement to check the validity of the d + s pairing in both compounds and relative weight of the two contributions.

A modified RSJ model is developed in a paper by Ch. Helms (Regensberg) et al. for the coupling of intrinsic Josephson oscillations and c-axis phonons in the Tl2Ba2Ca2Cu3O10+d and Bi2Sr2CaCu2O8+d systems. The model provides an explanation for recently reported subgap structures in the I-V characteristics of the c-axis transport.

Films

Effects of 1 MeV proton irradiation on both superconducting and normal- state properties of Hg-1212 and Hg-1223 thin films have been studied in a paper by A. A. Gapud et al. (TCSUH). The authors observe a linear decrease in Tc and increase of the residual resistivity as proton dose is increased similar to that seen for other HTS materials, but report greater sensitivity to proton doses.

High-quality c-axis oriented HgBa2CaCu2O6+d films have been grown epitaxially by J. Z. Wu et al. (TCSUH) on SrTiO3 substrates. The authors find that interface quality can be improved using a fast temperature ramping Hg vapor annealing process, and the technique is found to routinely yield Tc values above 120 K.

The current limiting properties of textured and epitaxial YBa2Cu3O7 films with different thickness on various substrates such as r-cut sapphire, polycrystalline Al2O3, and YSZ are examined in a preprint by R. Woerdenweber et al. (Juelich), and the correlation between structural, morphological, superconducting properties, and the evolution of current and electric field during ac and dc current pulses are determined. The best results are obtained in epitaxial YBa2Cu3O7 films on large-area CeO2/sapphire with a thin Au layer.

In another preprint A. G. Zaitsev et al. (Juelich) study structural properties and microwave losses of large area YBa2Cu3O7 films on r-cut sapphire buffered with a CeO2 layer of mixed (001)/(111) orientation.

Applications

Several papers in this issue received from ISI (Juelich) report progress in the development of a HTS-SQUID system in conjunction with the eddy current technique for nondestructive evaluation.

The development of an HTS-SQUID-based prototype for eddy current NDE, which can be operated in an unshielded environment is reported by M. V. Kreutzbruck et al., and results of measurements on aircraft parts are presented.

For detection of deep-lying flaws, an eddy current system in conjunction with a planar gradiometer is developed in a paper by R. Hohmann et al. Two dimensional scans are presented to illustrate the system's capability of finding fatigue cracks and corrosion pits hidden below ten flawless layers of aluminum (400 mm x 200 mm x 1.5 mm).

A preprint by A. Haller et al. reports evaluation of materials by a high-temperature SQUID gradiometer using rotating magnetic fields. This approach is found to be promising for ferromagnetically contaminated samples and radially oriented defects such as those originating from rivets.

A design for a portable nitrogen cryostat for operation of moving SQUIDs is presented in a paper by M. L. Lucia et al. rf SQUIDS and dc gradiometers are integrated with the cryostat, and results for fatigue- crack detection on stationary samples with moving SQUID sensors are shown.

An HTS magnetic levitation transportation prototype has been constructed by In-Gann Chen (National Cheng Kung) et al. and results of various parameters such as permanent magnet configurations, relative levitation stability, levitation force, as well as magnetic-field intensity and distribution are discussed.

Overviews

Recent theoretical and experimental progress in understanding the physical properties of two-dimensional nearly antiferromagnetic Fermi liquids is reviewed in a paper by David Pines (Urbana-Champaign). The author presents arguments that suggest the physical origin of the pseudogap in the quasiparticle spectrum below Tc is the formation of a precursor to the spin-density-wave state. He also discusses dynamic spin susceptibility, Fermi surface evolution, transport, Hall effect, and summarizes relevant experimental evidence. (21 refs.)

The formation mechanism of twins, stacking faults, microcracks, subgrain boundaries, and dislocations in connection with the refining strategies of Y2BaCuO5 (211) inclusions is discussed in an article by F. Sandiumenge et al. (CSIC). The influence of these defects and post- processing treatments on the critical current is analyzed and a complete magnetic phase diagram is proposed as a basis for systematic classification of the irreversible superconducting behavior in single- grain melt-textured YBa2Cu3O7-Y2BaCuO5 composites. (145 refs.)

An introduction to the fluctuation phenomenon in superconductivity, in the form of a brief review, is presented in a paper by A. A. Varlamov (Firenze). (62 refs.)

Contributed by Sreeparna Mitra ___________________________________________________________________________

Contents: Technology News is on page 4; Preprints begin on page 4; Coming Events begin on page 10; and Resources are on page 11.

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. ___________________________________________________________________________

TECHNOLOGY NEWS (Also see Applications section of Nota Bene.)

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.

At the 1997 CTIA Wireless Show in San Francisco, California, Conductus, Inc., displayed its Clearsite(TM) tower-mountable receiver, a new subsystem that is designed to provide "brick wall" filters which enable cellular phone operators to maximize spectrum utilization, thereby increasing capacity and protecting subscriber calls from unwanted and otherwise interfering out-of-band signals. The Clearsite(TM) subsystem consists of six superconducting interference-reduction receiver filters and six cryogenically cooled low-noise amplifiers as well as three conventional transmit filters designed to provide enhancements over commercially available filters. Both tower-mount and equipment-room configurations come equipped with closed-cycle Gifford-McMahon compressor/refrigeration units. For further information, contact Stephen M. Garrison, Product Marketing Manager, Conductus, Inc., 969 West Maude Ave., Sunnyvale, CA 94086; telephone (408) 523-9430; telefax (408) 523-9999.

Contributed by Sreeparna Mitra ___________________________________________________________________________

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.

M. V. Abrashev, A. P. Litvinchuk, C. Thomsen, and V. N. Popov, "Froehlich-Interaction Induced Multi-Phonon Raman Scattering in SrCuO2 and Sr0.5Ca0.5CuO2." To be published in Phys. Rev. B. Institut fuer Festkoerperphysik, Technische Universitaet Berlin, Sekr. PN 5-4, Hardenbergstrasse 36, D-10623 Berlin, GERMANY; telephone +49 30 314 22083; telefax +49 30 314 27705; e-mail abrashev@lise.physik.tu- berlin.de. 78.30.Hv; 63.20.Dj; 74.72.Jt.

F. M. Araujo-Moreira, P. Barbara, A. B. Cawthorne, and C. J. Lobb, "Reentrant ac Magnetic Susceptibility in Josephson-Junction Arrays." Submitted to Phys. Rev. Lett. Center for Superconductivity Research, Department of Physics, University of Maryland at College Park, College Park, MD 20742-4111; telefax (301) 314-9541. 74.25.Ha; 74.80.Bj; 74.50.+r.

J. Ashkenazi, "Stripes, Non-Fermi-Liquid Behavior, and High-Tc Superconductivity." To be published in J. Supercond. Department of Physics, University of Miami, Box 248046, Coral Gables, FL 33124. Key words: high-Tc superconductivity, stripes, transport properties, mechanism.

M. T. Beal-Monod and K. Maki, "Compared Hybrid Pairings for Orthorhombic YBCO Compounds and Suggested Experiments: the Singular Role of the CuO Chains." Submitted to Phys. Rev. B. Laboratoire de Physique des Solides, Universite Paris-Sud, Batiment 510, F-91405 Orsay Cedex, FRANCE; telephone +33 1 69 15 -6928 or -6750; telefax +33 1 69 15 6086; e-mail zazie@lps.u-psud.fr.

C. Bernhard, J. L. Tallon, C. Bucci, R. DeRenzi, G. Guidi, G.V.M. Williams, and Ch. Niedermayer, "Comment on 'Muon Spin Relaxation Studies of Zn-Substitution Effects in High-Tc Cuprate Superconductors.'" Submitted to Phys. Rev. Lett. Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, GERMANY; telephone +49 711 689 1733; telefax +49 711 689 1712; e-mail bernhard@cardix.mpi-stuttgart.mpg.de. 74.62.Dh; 76.75.+i.

J. J. Betouras and Robert Joynt, "Nonlinear Magnetization in Superconductors with s + d Ordering." Submitted to Phys. Rev. B. Department of Physics and Applied Superconductivity Center, University of Wisconsin-Madison, Madison, WI 53706.

St. Beuven, O. Harnack, L. Amatuni, H. Kohlstedt, and M. Darula, "Active Components for High-Tc Josephson Receivers." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY.

C. Boekema, D. W. Cooke, M. Merton, and O. Vera, "muSR Study of the Grain-Size Dependence of Y1237 Vortex States." Presented at the 5th Int. Conf. on Mater. and Mech. of Supercond. -- High-Temp. Supercond. (M^2S-HTSC V), Beijing, People's Republic of China, Feb. 28-Mar. 4, 1997. Department of Physics, College of Science, San Jose State University, San Jose, CA 95192-0106; telephone (408) 924-5260; e-mail boekemac@aol.com.

In-Gann Chen, Jen-Chou Hsu, Gwo Jamn, Chin E. Lin, and M. K. Wu, "Magnetic Leviation/Suspension System by High-Temperature Superconducting Materials." To be published in J. Appl. Phys. Department of Materials Science and Engineering, National Cheng Kung University, 1 Ta-Hsueh Road, Tainan, 70101, Taiwan, REPUBLIC OF CHINA; telephone +886 6 275 7575, ext. 62947; telefax +886 6 234 6290; e-mail ingann@mail.ncku.edu.tw.

In-Gann Chen, Gwo Jamn, Jen-Chou Hsu, and M. K. Wu, "Materials Characteristics of a Single Grained Y-Ba-Cu-O Superconductor." To be published in J. Appl. Phys. Department of Materials Science and Engineering, National Cheng Kung University, 1 Ta-Hsueh Road, Tainan, 70101, Taiwan, REPUBLIC OF CHINA; telephone +886 6 275 7575, ext. 62947; telefax +886 6 234 6290; e-mail ingann@mail.ncku.edu.tw.

In-Gann Chen, J. Liu, R. Weinstein, and R. Shaw, "Effect of Internal Uranium Fission on the Critical Current Density of Y-Ba-Cu-O Melt Textured Superconductors." To be published in the Proc. of the 9th Int. Symp. on Supercond. (ISS'96), Sapporo, Hokkaido, Japan, Oct. 21-24, 1996. Department of Materials Science and Engineering, National Cheng Kung University, 1 Ta-Hsueh Road, Tainan, 70101, Taiwan, REPUBLIC OF CHINA; telephone +886 6 275 7575, ext. 62947; telefax +886 6 234 6290; e-mail ingann@mail.ncku.edu.tw. Key words: high-temperature superconductor, Y-Ba-Cu-O superconductor, single grained, internal uranium fission, critical current density, residual radioactivity, U-Ba- Cu-O compound.

Tao Chen and S. Teitel, "Helicity Modulus and Fluctuating Type II Superconductors: Elastic Approximation and Numerical Simulations." Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627; S. Teitel's e-mail stte@pas.rochester.edu; preprint also available at cond-mat@xxx.lanl.gov (#9702010). 74.60.Ge; 64.60.-i; 74.40.+k.

O. Chmaissem, J. D. Jorgensen, D. G. Hinks, B. G. Storey, B. Dabrowski, H. Zhang, and L. D. Marks, "Structure and Superconductivity in Cr- Substituted HgBa2CuO4+d." Submitted to Physica C. Contact Janice Coble, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439; telefax (708) 252-9595; e-mail janice_coble@qmgate.anl.gov.

M. Ciszek, B. A. Glowacki, A. M. Campbell, S. P. Ashworth, W. Y. Liang, P. Haldar, and V. Selvamanickam, "Influence of External Magnetic Field and its Orientation on Transport ac Losses in Bi-2223 and Tl-1223 Silver Sheathed Tapes." Presented at the Appl. Supercond. Conf., Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Interdisciplinary Research Centre in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, UNITED KINGDOM; telephone +44 1223 33 74 41; telefax +44 1223 33 70 74; e-mail mc10023@hermes.cam.ac.uk.

L. Coffey, D. Lacy, K. Kouznetsov, and A. Erner, "Dependence of Angle Resolved Photoemission Spectra of High Temperature Superconductors on the Spin Fluctuation Susceptibility." Department of Biological, Chemical, and Physical Sciences, Room 182, Life Science, Armour College of Engineering, Illinois Institute of Technology, 3101 South Dearborn Street, Chicago, IL 60616-3793; telephone (312) 567-3480; telefax (312) 567-3494; e-mail coffey@compton.phys.iit.edu; preprint also available at cond-mat@xxx.lanl.gov (#9702179).

R. Cristiano, L. Frunzio, C. Nappi, S. Pagano, V. G. Palmieri, H. Akoh, H. Nakagawa, S. Takada, M. V. Fistul, V. N. Gubankov, and M. P. Lisitskii, "Effect of Abrikosov Vortices on Fiske Steps of a Josephson Tunnel Junction." Istituto di Cibernetica C.N.R., Via Toiano 6, I-80072 Arco Felice, Naples, ITALY. M. V. Fistul's telephone at Purdue University (317) 494-3036; telefax (317) 494-0706.

Thomas Peter Devereaux and Arno Paul Kampf, "Raman Scattering in Cuprate Superconductors." To be published in Int. J. Mod. Phys. B. Department of Physics, George Washington University, Washington, D.C. 20052; e-mail tpd@gwis2.circ.gwu.edu; preprint also available at cond-mat@xxx.lanl.gov (#9702186). Key words: superconductivity, disorder, Raman scattering, oxide superconductors.

Daniel Dominguez, Niels Gronbech-Jensen, and A. R. Bishop, "First-Order Melting of a Moving Vortex Lattice: Effects of Disorder." Preprint #LA-UR-96-3261; to be published in Phys. Rev. Lett. Centro Atomico Bariloche, Comision Nacional de Energia Atomica, 8400 San Carlos de Bariloche, Rio Negro, ARGENTINA; e-mail domingd@cab.cnea.edu.ar; preprint also available at cond-mat@xxx.lanl.gov (#9610003). 74.60.Ge; 74.60.Ec; 74.50.+r.

M. I. Faley, U. Poppe, K. Urban, H.-J. Krause, H. Soltner, R. Hohmann, D. Lomparski, R. Kutzner, R. Woerdenweber, H. Bousack, A. I. Braginski, V. Yu. Slobodchikov, A. V. Gapelyuk, V. V. Khanin, and Yu. V. Maslennikov, "dc-SQUID Magnetometers and Gradiometers on the Basis of Quasiplanar Ramp-Type Josephson Junctions." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Festkoerperforschung, KFA Juelich, D-52425 Juelich, GERMANY.

Mikhail V. Fistul and Gabriele F. Giuliani, "Dynamic Response of Inhomogeneous Josephson Junctions and Random Potentials Theory." Department of Physics, Purdue University, West Lafayette, IN 47907; telephone (317) 494-3036; telefax (317) 494-0706. 74.20.-z; 74.50.+r.

Michael E. Flatte and Jeff M. Byers, "Local Electronic Structure of Defects in Superconductors." Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242; e-mail flatte@rashi.physics.uiowa.edu; preprint also available at cond-mat@xxx.lanl.gov (#9612213).

B. Friedman and G. Levine, "Configuration Interaction Approach to the Two Dimensional Hubbard Model Near Half-Filling." Preprint #97:017; to be published in Phys. Rev. B. Department of Physics, Sam Houston State University, Huntsville, TX 77341; preprint also available from 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. 74.20.Mn; 71.27.+a.

A. A. Gapud, J. R. Liu, J. Z. Wu, W. N. Kang, B. W. Kang, S. H. Yun, and W. K. Chu, "Effects of 1-MeV Proton Irradiation in Hg-Based Cuprate Thin Films." Preprint #97:019; to be published in Phys. Rev. B. Department of Physics and Astronomy, University of Kansas, Lawrence, KS 66045; e- mail gapud@kuphsx.phsx.ukans.edu; preprint also available at 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.

T. J. Hagenaars, E. H. Brandt, R. E. Hetzel, W. Hanke, M. Leghissa, and G. Saemann-Ischenko, "Vortex-Line Liquid Phases: Longitudinal Superconductivity in the Lattice London Model." Institut fuer Theoretische Physik, Universitaet Wuerzburg Am Hubland, D-97074 Wuerzburg, GERMANY; e-mail hagenaar@physik.uni-wuerzburg.de; preprint also available at cond-mat@xxx.lanl.gov (#9701218).

A. Haller, Y. Tavrin, and H.-J. Krause, "Eddy-Current Nondestructive Material Evaluation by High-Temperature SQUID Gradiometer Using Rotating Magnetic Fields." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY.

Grzegorz Haran, Jason Taylor, and A.D.S. Nagi, "Impurity Scattering Effect on the Specific Heat Jump in Anisotropic Superconductors." To be published in Phys. Rev. B. Department of Physics, University of Waterloo, Waterloo, Ontario, CANADA N2L 3G1; e-mail haran@infeld.uwaterloo.ca; preprint also available at cond-mat@xxx.lanl.gov (#9702165). 74.20.-z; 74.20.De; 74.20.Fg.

Ch. Helm, Ch. Preis, F. Forsthofer, J. Keller, K. Schlenga, R. Kleiner, and P. Mueller, "Subgap Structures in the Current-Voltage Characteristic of the Intrinsic Josephson Effect Due to Phonons." Submitted to Physica C: Proc. of the 1997 Int. Symp. on Intrinsic Josephson Effect and THz Plasma Oscillations in High-Tc Supercond., Sendai, Japan, Feb. 23-25, 1997. Institut fuer Theoretische Physik, Universitaet Regensburg, D- 93040 Regensburg, GERMANY; e-mail christian.helm@rphs1.physik.uni- regensburg.de; preprint also available at cond-mat@xxx.lanl.gov (#9701215).

R. Hohmann, H.-J. Krause, H. Soltner, Y. Zhang, C. A. Copetti, H. Bousack, A. I. Braginski, and M. I. Faley, "HTS SQUID System with Joule- Thomson Cryocooler for Eddy Current Nondestructive Evaluation of Aircraft Structures." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY.

C. Horstmann, P. Leinenbach, R. Dittmann, U. Memmert, U. Hartmann, and A. I. Braginski, "Correlation Between Ramp Morphology and Properties of Ramp-Type Junctions." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY; telefax +49 2461 612940; e-mail c.horstmann@kfa-juelich.de.

Magnus Hurd, "Current-Voltage Relation for Superconducting d-Wave Junctions." Room 6118, Forskarhuset, Department of Microelectronics and Nanoscience, Chalmers University of Technology and Goteborg University, S-412 96 Goteborg, SWEDEN; telephone +46 31 772 3144; telefax +46 31 772 3436; e-mail hurd@fy.chalmers.se; preprint also available at cond-mat@xxx.lanl.gov (#9702028). 74.50.+r; 74.25.-q; 74.20.-z.

Alexander M. Klushin, Stefan Schornstein, Hermann Kohlstedt, Gerd Wende, Frank Thrum, and Hans-Georg Meyer, "Stacked Niobium Josephson Junction Arrays Under X-Band Irradiation." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY; telephone +49 2461 612348; telefax +49 2461 612940; e-mail klushin@isitel1.isi.kfa- juelich.de.

V. G. Kogan, M. Bullock, B. Harmon, P. Miranovic, Lj. Dobrosavljevic- Grujic, P. L. Gammel, and D. J. Bishop, "Vortex Lattice Transitions in Borocarbides." To be published in Phys. Rev. B. Ames Laboratory-USDOE and Department of Physics, Iowa State University, Ames, IA 50011-3020; telephone (515) 294-8080; e-mail kogan@ameslab.gov. 74.60.-w.

V. G. Kogan, P. Miranovic, Lj. Dobrosavljevic-Grujic, W. E. Pickett, and D. K. Christen, "Vortex Lattices in Cubic Superconductors." Ames Laboratory-USDOE and Department of Physics, Iowa State University, Ames, IA 50011-3020; telephone (515) 294-8080; e-mail kogan@ameslab.gov. 74.60.-w.

Y. Kopelevich, V. V. Makarov, and S. Moehlecke, "Disorder Induced Asymmetric Magnetization in Bi2Sr2Ca2Cu3O10." To be published in Physica C. Instituto de Fisica "Gleb Wataghin", Universidade Estadual de Campinas (UNICAMP), C.P. 6165, Campinas, Sao Paulo 13083-970, BRAZIL; telefax +55 19 239 31 27; e-mail kopel@ifi.unicamp.br. Key words: high-Tc superconductors, magnetization, flux creep, flux pinning.

J. M. Kosterlitz and M. V. Simkin, "Numerical Study of a Superconducting Glass Model." Contact M. V. Simkin, Department of Physics, Brown University, Providence, RI 02912-1843; e-mail simkin@barus.physics.brown.edu; preprint also available at cond-mat@xxx.lanl.gov (#9702166). 74.40.+k; 75.10.

M. V. Kreutzbruck, J. Troell, M. Mueck, C. Heiden, and Y. Zhang, "Experiments on Eddy Current NDE with HTS rf SQUIDs." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Angewandte Physik, Justus-Liebig-Universitaet, D-6300 Giessen, GERMANY.

E. Z. Kuchinskii, M. V. Sadovskii, and M. A. Erkabaev, "Superconductivity Suppression Close to the Metal-Insulator Transition in Strongly Disordered Systems." Submitted to JETP. Institute for Electrophysics, Russian Academy of Sciences, Ural Branch, Ekaterinburg 620049, RUSSIA; e-mail sadovski@ief.intec.ru; preprint also available at cond-mat@xxx.lanl.gov (#9611187). 71.30.+h; 71.55.Jv; 72.15.Rn; 74.20.Fg.

Ming Lei, Albert Migliori, and Hassel Ledbetter, "Acoustic Evidence Against BCS Behavior in Monocrystal YBa2Cu3O7." Presented at the 5th Int. Conf. on Mater. and Mech. of Supercond. -- High-Temp. Supercond. (M^2S-HTSC V), Beijing, People's Republic of China, Feb. 28-Mar. 4, 1997. Contact Hassel Ledbetter, Materials Reliability Division 853, National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80303. Key words: attenuation, BCS theory, electron-pair symmetry, energy gap, yttrium cuprate.

D. V. Livanov, E. Milani, G. Balestrino, and C. Aruta, "In-Plane and Out-of-Plane Transport Properties of Bi2Sr2CaCu2O8+x Epitaxial Films: Fluctuations and Transition into Vortex Solid State." To be published in Phys. Rev. B. Contact E. Milani, Dipartimento di Scienze e Tecnologie Fisiche ed Energetiche, Universita' di Roma "Tor Vergata", Via della Ricerca Scientifica, I-00133 Roma, ITALY; telefax +39 6 2021351; e-mail milani@utovrm.it. 74.25.Fy; 74.40.+k; 74.72.Hs; 74.76.Bz.

M. L. Lucia, R. Hohmann, H. Soltner, H.-J. Krause, W. Wolf, H. Bousack, M. I. Faley, G. Spoerl, and A. Binneberg, "Operation of HTS SQUIDs with a Portable Cryostat: a SQUID System in Conjunction with Eddy Current Technique for Non-Destructive Evaluation." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Departamento de Fisica Aplicada III, Universidad Complutense de Madrid, Madrid E-28040, SPAIN.

Georg J. Ockenfuss, Joerg Borgmann, Marc Reese, and Roger Woerdenweber, "Optimization of Large-Area Single-Layer Flux-Transformers and Concentrators Coupled to rf-SQUIDs in Flip-Chip Geometry." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY.

B. Oelze, B. Ruck, E. Sodtke, T. Filippov, A. Kidiyarova-Shevchenko, M. Kupriyanov, and W. Prusseit, "Investigation of the Signal Resolution of a High-Tc RSFQ Comparator." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY.

Vladimir M. Pan, Vjacheslav F. Solovjov, and Herbert C. Freyhardt, "Dimensional Crossovers and Related Flux Line-Lattice States in YBa2Cu3O7-d." Submitted to Physica C. Department of Superconductivity, Institute for Metal Physics, Vernadsky Blvd., 36, National Academy of Sciences of Ukraine, Kiev 252142, UKRAINE; telephone +380 44 444 10 31; telefax +380 44 444 10 31; e-mail pan@d09imp.kiev.ua.

F. Perez-Rodriguez, N. M. Makarov, O. M. Yevtushenko, and A. Panchekha, "Fractal Analysis of the Nonlinear Electromagnetic Response of Irreversible Type-II Superconductors." Instituto de Fisica, Universidad Autonoma de Puebla, Apdo. Postal J-48, Puebla, Pue. 72570, MEXICO; telephone +52 22 45 76 45; telefax +52 22 44 89 47. 74.25.Nf; 05.45.+b.

F. Perez-Rodriguez, A. Perez-Gonzalez, John R. Clem, G. Gandolfini, and M.A.R. LeBlanc, "Flux-Line Cutting in Granular High-Temperature Superconductors." Submitted to Phys. Rev. B. Instituto de Fisica, Universidad Autonoma de Puebla, Apdo. Postal J-48, Puebla, Pue. 72570, MEXICO; telephone +52 22 45 76 45; telefax +52 22 44 89 47. 74.60.Ec; 74.60.Ge; 74.60.Jg.

Stephen W. Pierson, Oriol T. Valls, Zlatko Tesanovic, and Michael A. Lindemann, "3D Lowest Landau Level Theory Applied to YBCO Magnetization and Specific Heat Data: Implications for the Critical Behavior in the H-T Plane." Submitted to Phys. Rev. B. Department of Physics, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA 01609-2280; telephone (508) 831-5258 or -5391; telefax (508) 831-5886; e-mail pierson@wpi.edu; Web site http://www.wpi.edu/~pierson/pubs.html; preprint also available at cond-mat@xxx.lanl.gov (#9702177). 74.60.Jg; 74.25.Dw; 74.72.-h; 64.60.Ak.

David Pines, "Nearly Antiferromagnetic Fermi Liquids: A Progress Report." Department of Physics, University of Illinois at Urbana- Champaign, 1110 West Green Street, Urbana, IL 61801-3080; e-mail d- pines@uiuc.edu.

T. Rajasekharan, E. Sudhakar Reddy, N.V.N. Viswanath, and N. Haribabu, "Shape Forming Simultaneous with Jc Enhancement in ReBa2Cu3O7 Superconductors." To be published in the Proc. of the Int. Symp. on Advances in Supercond.: New Materials, Critical Currents and Devices, (ASMCCD '96), Mumbai, India, Sept. 17-20, 1996. Defence Metallurgical Research Laboratory, Hyderabad 500058, INDIA.

E. F. Righi, S. A. Grigera, D. Lopez, G. Nieva, F. de la Cruz, L. Civale, G. Pasquini, and P. Levy, "Enhancement of c-Axis Vortex Correlation by Twin Boundaries and Columnar Defects in YBa2Cu3O7-d." To be published in Phys. Rev. B. Centro Atomico Bariloche and Instituto Balseiro, Comision Nacional de Energia Atomica, 8400 San Carlos de Bariloche, ARGENTINA.

Kazuo Saitoh, Yoshihiro Ishimaru, Hiroyuki Fuke, and Youichi Enomoto, "A Model Analysis for Current-Voltage Characteristics of Superconducting Weak Links." To be published in Jpn. J. Appl. Phys. (in press). Superconductivity Research Laboratory, International Superconductivity Technology Center (ISTEC), 10-13 Shinonome 1-chome, Koto-ku, Tokyo 135, JAPAN; telephone +81 3 3536-5703 through -5705; telefax +81 3 3536-5714 or -5717. Key words: superconducting weak link, current-voltage characteristics, resistively shunted junction, flux flow.

A. V. Samoilov, M. Konczykowski, M. V. Feigel'man, and F. Holtzberg, "Bose-Glass and Entanglement--Disentanglement Transitions in YBa2Cu3O7." Submitted to Physica C: Proc. of the 5th Int. Conf. on Mater. and Mech. of Supercond. -- High-Temp. Supercond. (M^2S-HTSC V), Beijing, People's Republic of China, Feb. 28-Mar. 4, 1997. Condensed Matter Physics 114- 36, California Institute of Technology, Pasadena, CA 91125.

F. Sandiumenge, B. Martinez, and X. Obradors, "Tailoring of Microstructure and Critical Currents in Directionally Solidified YBa2Cu3O7-x." Submitted to Supercond. Sci. Technol. Institut de Ciencia de Materials de Barcelona, C.S.I.C., Campus Universitat Autonoma de Barcelona, E-08193 Bellaterra, Catalunya, SPAIN; telephone +34 9 3 580 1853; telefax +34 9 3 580 5729; e-mail felip@icmvax.icmab.es.

Louis Taillefer, Benoit Lussier, Robert Gagnon, Kamran Behnia, and Herve Aubin, "Universal Heat Conduction in YBa2Cu3O6.9." Submitted to Phys. Rev. Lett. Department of Physics, McGill University, 3600 University, Montreal, Quebec, CANADA H3A 2T8; telephone (514) 398-6476; telefax (514) 398-6526; e-mail louis@physics.mcgill.ca. 74.25.Fy; 74.72.Bk.

T. Tamura, S. Adachi, X.-J. Wu, T. Tatsuki, and K. Tanabe, "Pb-1223 Cuprate Superconductor with Tc above 120 K Synthesized under High Pressure." Preprint #N96378; to be published in Physica C. Superconductivity Research Laboratory, International Superconductivity Technology Center (ISTEC), 10-13 Shinonome 1-chome, Koto-ku, Tokyo 135, JAPAN; telefax +81 3 3536-5717.

J. R. Thompson, L. Krusin-Elbaum, L. Civale, G. Blatter, and C. Feild, "Super-Fast Vortex Creep in YBa2Cu3O7-d Crystals with Columnar Defects: Evidence for Variable Range Vortex Hopping." To be published in Phys. Rev. Lett. Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, TN 37831.

N. Thyssen, H. Kohlstedt, and A. V. Ustinov, "Experimental Study of Flux Flow and Resonant Modes in Multi-Junction Josephson Stacks." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institute of Thin Film and Ion Technology, Research Center (KFA), D-52425 Juelich, GERMANY.

A. A. Varlamov and M. Ausloos, "Fluctuation Phenomena in Superconductors." To be published in the Proc. of the Adriatico Res. Conf. and NATO Adv. Res. Workshop on Fluctuation Phenomena in HTSC, Trieste, Italy, Aug. 5-8, 1996. Istituto Nazionale di Fisica della Materia, Laboratorio "Forum", Dipartimento di Fisica, Universita di Firenze, L.E. Fermi, 2 Firenze I-50125, ITALY; M. Ausloos's telephone at S.U.P.R.A.S. in Liege, Belgium +32 4 366 37 52; telefax +32 4 366 29 90; e-mail ausloos@gw.unipc.ulg.ac.be.

R. P. Vasquez, D. L. Novikov, A. J. Freeman, and M. P. Siegal, "Electronic Structure of TIBa2CaCu2O7-d." Submitted to Phys. Rev. B. Center for Space Microelectronics Technology, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109-8099; e-mail richard.p.vasquez@jpl.nasa.gov. 74.72.Fq; 74.25.Jb; 74.76.Bz; 79.60.-i.

M. Vaupel, G. Ockenfuss, and R. Woerdenweber, "Optimization and Magnetic Field Behavior of Sputtered Submicron YBa2Cu3O7 Step-Edge Josephson- Junctions." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY.

Y. M. Vilk and A.-M.S. Tremblay, "New Many-Body Approach to the Hubbard Model and Single-Particle Pseudogap." Materials Science Division, Argonne National Laboratory, Bldg. 223, 9700 S. Cass Avenue, Argonne, IL 60439; e-mail yvilk@hexi.msd.anl.gov; preprint also available at mat@xxx.lanl.gov (#9702188).

F. Warmont, V. Hardy, Ch. Goupil, Ch. Simon, J. Provost, and A. Ruyter, "Angle-Resolved Transport Measurements in a Bi-2212 Crystal with Inclined Columnar Defects: Study of the Directional Effects." To be published in Physica C. Contact V. Hardy, Laboratoire CRISMAT, CNRS, URA 1318, ISMRA et Universite de Caen, 6 Boulevard du Marechal Juin, F- 14050 Caen Cedex, FRANCE; telefax +33 2 31 95 1600; e-mail physol@crismat.ismra.fr. Key words: electrical resistivity, flux pinning, irradiation effect, irreversibility line. 74.25.Fy; 74.60.Ge; 74.60.Jg; 74.62.Dh.

R. Woerdenweber, J. Schneider, A. I. Zaitsev, R. Kutzner, T. Koenigs, and P. Lahl, "Current Limiting Properties of Superconducting YBa2Cu3O7 Films on Various Substrates." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY.

J. Z. Wu, S. H. Yun, A. A. Gapud, B. W. Kang, W. N. Kang, S. C. Tidrow, T. P. Monahan, X. T. Cui, and W. K. Chu, "Epitaxial Growth of HgBa2CaCu2O6+d Thin Films on SrTiO3 Substrates." Preprint #97:018; to be published in Physica C. Department of Physics and Astronomy, University of Kansas, Lawrence, KS 66045; preprint also available from 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.

S. Wu, W. Lo, W. Y. Liang, and S. C. Tidrow, "Large Enhancement of Phase Formation in Polycrystalline Tl-1223 Superconductors by LaAIO3 or LSAT Micro-Particle Addition." Submitted to Appl. Phys. Lett. Interdisciplinary Research Centre in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, UNITED KINGDOM; telephone +44 1223 337 443; telefax +44 1223 337 074; e-mail sw204@cus.cam.ac.uk.

Alexander G. Zaitsev, Roger Woerdenweber, Georg Ockenfuss, Rolf Kutzner, Thomas Koenigs, Claudio Zuccaro, and Norbert Klein, "Microwave Losses and Structural Properties of Large-Area YBa2Cu3O7 Films on r-cut Sapphire Buffered with (001)/(111) Oriented CeO2." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY.

Y. Zhang, H. Soltner, H.-J. Krause, E. Sodtke, W. Zander, J. Schubert, M. Grueneklee, D. Lomparski, M. Banzet, H. Bousack, and A. I. Braginski, "Planar HTS Gradiometers with Large Baseline." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY.

Y. Zhang, H. Soltner, N. Wolters, W. Zander, J. Schubert, M. Banzet, and A. I. Braginski, "HTS rf SQUIDs with Fully Integrated Planar Tank Circuits." Presented at the Appl. Supercond. Conf. (ASC'96), Pittsburgh, PA, Aug. 25-30, 1996; to be published in IEEE Trans. Appl. Supercond. Institut fuer Schicht- und lonentechnik, Forschungszentrum Juelich GmbH, D-52425 Juelich, GERMANY.

Michael Ziese, "Nonlinear Transport in High-Temperature Superconductors in a Percolation Model." To be published in Phys. Rev. B. Department of Physics, Hicks Building, University of Sheffield, Hounsfield Road, Sheffield S3 7RH, UNITED KINGDOM; e-mail m.ziese@sheffield.ac.uk. 74.60.Ge; 74.72.-h; 64.60.Ht. ___________________________________________________________________________

COMING EVENTS (An * indicates a previously listed event.)

April 1 - 4, 1997: The 1997 IEEE International Magnetics Conference (INTERMAG 97), Hyatt Regency at the New Orleans Superdome, New Orleans, Louisiana. Forum for engineers and scientists to discuss new developments in the field of applied magnetics. Sessions will include invited and contributed papers, oral and poster presentations, and invited symposia. The diversity of magnetism is represented by presentations covering all branches of magnetism and related technology. Sessions on magnetic levitation, thin films, multilayers, and applied superconductivity. For information, contact one of the Conference Coordinators: Diane Suiters, Cecile Phillips, or Amy Landsbaum; INTERMAG '97 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 Web site http://yara.ecn.purdue.edu/~smag/.

April 15 - 16, 1997: IEA International Workshop on High-Tc Superconducting Power Transmission Cables, CISE, Segrate (Milan), Italy. The Workshop is organized within the frame of "IEA Implementing Agreement for a Cooperative Programme for Assessing the Impacts of High- Temperature Superconductivity on Electric Power." Developers, utilities, and agencies will participate at the workshop to discuss and outline the worldwide state of the art in this field. Workshop is organized as a single oral session with invited speakers and a panel discussion. Participation is open. The official language is English. The announcement, workshop program, and participation form are available at the World Wide Web sites http://www.cre.enel.it and http://www.maspec.bo.cnr.it/SCENET. For further information please contact Carla Renucci, IEA Workshop Secretariat, CISE SpA, Via Reggio Emilia, 39, 20090 Segrate (Milan), Italy; telephone +39 2-216 72500; telefax +39 2-216 72620; e-mail 0964renu@s1.cise.it.

April 21 - 25, 1997: International Conference on Metallurgical Coatings and Thin Films (ICMCTF), Town and Country Hotel, San Diego, CA. More than 500 papers to be presented from Europe, Asia, and North America. Symposia emphasize developments in hard coatings, diamond coatings, high-temperature coatings, microelectronic thin films, and optical coatings. Methods of deposition include thermal spray, electrolytic deposition, physical vapor deposition, chemical vapor deposition, ion- assisted and ion-beam technologies, and laser-assisted deposition. Integrating advances in coating and surface modification research into manufacturing processes and equipment technology will be covered. To receive preliminary program, contact Mary S. Gray, Conference Secretary, Suite 502, 1090 G. Smallwood Drive, Waldorf, MD 20603; telefax (301) 645-1426.

*June 30 - July 3, 1997: 3rd European Conference on Applied Superconductivity (EUCAS'97), Veldhoven, The Netherlands. Will include 9 plenary sessions, 21 oral sessions, and 4 poster sessions with keynote lecture at the beginning of each oral session. One plenary session will be devoted to industrial applicability of superconductivity and industrial perspective. Program will be broadly divided into small- scale & electronic applications, and large-scale & power applications. Former category will include Josephson junctions, SQUIDs, digital applications, mixers/detectors, passive devices, oscillators, materials aspects related to superconducting electronics, system aspects, and other applications. Latter category will include fusion and SMES, detectors and accelerators, motors and generators, high magnetic fields, power applications, materials aspects related to large-scale applications, system aspects, and other applications. In addition, there will be special-topics presentations by invited lectures on new materials, flux pinning, applied theory of superconductivity, packaging and cooling, and an overview of ISEC-Berlin. Participants can present work (mainly via poster sessions) related to the special topics after the special-topics lectures. Deadline for special topics contributions, March 15, 1997. For general conference information, contact Convention Bureau Basics, P.O. Box 217, 7500 AE, Enschede, The Netherlands; telephone +31 53-489 4444; telefax +31 53-489 4442; e-mail a.spierenburg@basics.utwente.nl. For scientific queries, contact eucas@tn.utwente.nl. Information also available at the web site http://eucas.tn.utwente.nl/eucas/intro.htm.

*July 7 - 9, 1997: International Workshop on the Processing and Applications of Superconducting (RE)BCO Large Grain Materials, Fitzwilliam College, University of Cambridge, United Kingdom. Topics will include (1) Growth Process: growth mechanisms and morphology, seeding effects, and faceting; (2) Processing: process optimization, rate of production, control of growth morphology, oxygenation, irradiation, hot pressing, joining, and machining; (3) Microstructural Properties: homogeneity, 211 distribution, platelet boundaries, dislocations, second-phase segregation, and radiation damage; (4) Superconducting Properties: Jc-microstructure correlation, role of defects, factors limiting Jc, and trapped field; (5) Applications: materials requirements, device design, and demonstrators development. Abstract deadline, March 20, 1997; early registration deadline, June 30, 1997. For further information and submission of abstracts contact Wai Lo, Workshop Secretariat, PASREG, IRC in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom; telefax +44-1223-337074; e-mail wl103@hermes.cam.ac.uk; Web site http://www.sucon.cam.ac.uk/Workshops/PASREG.html.

*Aug. 25 - 28, 1997: 16th General Conference of the Condensed Matter Division of the European Physical Society, Katholieke Universiteit Leuven, Leuven, Belgium. Particular emphasis on the following areas: low-temperature physics and superconductors, magnetism and metals, semiconductors and insulators, soft matter and statistical mechanics, and surfaces and interfaces. Special symposium "Forty Years of the Vortex State" by A. A. Abrikosov. For further information, contact The Secretary-General, 16th CMD-General Conference, Departement Natuurkunde K. U. Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium; telephone +32 16 32 71 75; telefax +32 16 32 79 83. 9/1/96, 11/15/96, 12/15/96

Sept. 21 - 26, 1997: Tenth International Conference on Surface Modification of Metals by Ion Beams (SMMIB-97), Gatlinburg Convention Center, Gatlinburg, Tennessee. For exchange of information on ion and plasma processing of materials, with the research being directed primarily toward mechanical aspects, wear, corrosion, optics, and applications of materials surfaces. Will include metallic materials, ceramics, polymers, carbon forms, and synthesized materials. Contributed papers are solicited in these and related areas, including: 1) Fundamental Aspects -- molecular dynamics and other dynamic simulation and theoretical modeling studies, transport mechanisms, reactions, and kinetics for ion-implanted constituents, role of radiation damage and sputtering, ion-beam mixing, and fundamentals of film nucleation and growth by use of energetic atoms; 2) Equipment, Techniques and Processing -- plasma source implantation, large-beam equipment, advances in equipment and ion source design, and important new acquisitions and facilities, ion-beam-assisted deposition (IBAD) and other co-processing techniques, and process design; 3) Properties and Analyses -- Micromechanical, corrosion, optical, electrical, magnetic, topographical, and other properties of ion-treated materials; and 4) Applications -- Industrial, defense, biomedical, and other applications, new applications and future trends, economic factors, and environmental and safety issues. Abstract deadline, May 1, 1997. Commercial exhibition. For information, contact Oak Ridge National Laboratory, Building 3137, MS-6057, P.O. Box 2008, Oak Ridge, TN 37831-6057; telefax (423) 576-8135; e-mail smmib@ornl.gov; Web site http://www.ornl.gov/smmib97.

March 29 - April 3, 1998: Symposium on Applications of Spectroscopy to Superconducting Materials, 215th Spring National American Chemical Society Meeting, Dallas, Texas. Call for papers. Topics will include oral sessions of optical spectroscopies, photoexcitation spectra, other spectra, and applications. The meeting is not restricted to cuprates and may include studies of organic superconductors, fullerides, heavy fermions, and conventional materials. Proceedings to be published. Abstract deadline, September 1, 1997. Contact E. Faulques, Institut the Materiaux, LPC, 2 rue de la Houssiniere, BP 32229, F-44322 Nantes Cedex 3, France; telephone +33 2 40 373972; telefax +33 2 40 373991; e-mail faulques@cnrs-imn.fr; Web site http://www.acs.org/. ___________________________________________________________________________

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New Book: Processing and Properties of High-Tc Superconductors -- Volume 2: Thin Films and Applications, edited by Sungho Jin and David K. Christen. Purpose is to offer the HTS community a comprehensive state-of-the-art review on the processing, microstructural changes, properties, and applications of thin-film and thick-film superconductors. Contents: overview of HTSC thin film deposition and techniques; chemical vapor deposition; ultra thin layers and superlattices; effect of substrates on deposition and properties; growth mechanisms and microstructures; development of Josephson junctions devices based on YBCO; HTS films for microwave devices; fabrication, properties, and applications of HTSC-semiconductor hybrid circuits; epitaxial heterostructures of metallic oxides for integrated superconducting devices; and prospects for HTS thick-deposit conductors. Publ. 1996; 500 pp.; price $99; ISBN 981-02-1670-X. Contact World Scientific Publishing Co. Inc., 1060 Main St., River Edge, NJ 07661; telephone (800) 227-7562 or (201) 487-9655; telefax (201) 487-9656. In Europe, World Scientific Publishing Co. Ltd., 57 Shelton Street, Covent Garden, London WC2 9HE, UK; telephone +44 171 836 0888; telefax +44 171 836 2020. In Asia, World Scientific Publishing Co. Pte. Ltd., Farrer Road, P.O. Box 128, Singapore 9128; telephone +65 3825663; telefax +65 3825919. Information also available at the Web sites http://www.singnet.com.sg/~wspclib or http://www.wspc.co.uk.

Proceedings: Thin Films: Stresses and Properties VI, MRS Symposium Proceedings Series, Vol. 436, edited by William W. Gerberich, Huajian Gao, Jan-Eric Sundgren, and Shefford P. Baker. Focuses on the various types of information that can be obtained from synchrotron-related techniques in order to expand use of this powerful experimental approach to materials research. Topics include structure of reduced dimensional materials, microscopy, topography and tomography, x-ray probes of solids, and materials characterization with x-ray probes. Publ. 1996; price $66 (members), $76 (US list), $88 (non-US list); ISBN 1-55899-340- 1. Contact the Materials Research Society, Customer Services Dept., 9800 McKnight Road, Pittsburgh, PA 15237-6006; telephone (412) 367-3012; telefax (412) 367-4373; e-mail info@mrs.org.

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.

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. E-mail: MITRA@AMESLAB.GOV or MITRA@IASTATE.EDU.

Project Director/Editor: Sreeparna Mitra Science Editor: John R. Clem High-Tc Update, Vol. 11, #6, March 15, 1997.