HIGH-Tc UPDATE E-MAIL VERSION, VOL. 13, NO. 17, Sept. 1, 1999.
<p>
 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, and other
 agencies, organizations, and individuals.
 <hr>
<p>
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<p>
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<p>
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 <hr>
<p>
 NOTA BENE: The following Nota Bene is contributed by Sreeparna Mitra,
 Project Director and Editor of High-Tc Update. Our Science Editor, John
 R. Clem, is currently on travel.
<p>
<p>
 YBCO
<p>
 A paper by A. Schilling (Zurich) et al., reports measurements of the
 magnetic torque tau experienced by an untwinned YBa2Cu3O7-d single
 crystal in an external field up to mu_0H = 7 T below Tc, as a function
 of Theta, the angle between H and the c axis of the crystal. The
 authors observe discontinuities in both tau and [del(tau)/del(H)]_T at
 the vortex lattice melting temperature that are related to changes in
 the transverse components of the magnetization vector M and
 [del(M)/del(H)]_T respectively. From the [del(tau)/del(H)]_T data, the
 authors are able to extract the differences in the reduced specific heat
 between the vortex-fluid and vortex-solid phases, and compare results
 with corresponding thermal data. The authors also examine the validity
 of standard angular scaling rules for anisotropic superconductors for
 melting fields H_m(T,Theta) and temperatures as high as T/Tc = 0.99.
<p>
 Resistivity measurements as a function of temperature are reported for
 optimally and overdoped heavily twinned YBa2Cu3O7-d single crystals by
 J.-C. Grivel (Stockholm) et al. under a magnetic field B oriented
 parallel to the twin boundary planes (B||c). Characteristic features
 attributed to the flux-line lattice melting transition have been
 observed in the overdoped case for B >= 5 T. The first-order transition
 was not found in the optimally doped sample, even when B was tilted with
 respect to the c-axis. The authors discuss the differences between
 these two samples.
<p>
 In two related papers, C. Vaast-Paci et al. (DRECAM-SPEC) describe a
 method for measuring the local fields arising from the vortex lattice in
 YBa2Cu3O7-d based on the field dependence of the electronuclear energy
 levels of non-perturbing [170]^Yb^[3+] Mossbauer probes. In the first
 paper, they report results for bulk and surface penetration lengths. In
 the second paper, the authors examine the directional properties of the
 vortex lattice in grain-oriented YBa2Cu3O7-d as a function of the
 direction of the applied field relative to the c axis.
<p>
 The microstructure and magnetic properties of textured YBa2Cu3O7-d
 samples are discussed in a preprint by G. Plesch (Comenius) et al.
 Samples prepared by a powder-melting process and those prepared by the
 quench-and-melt growth technique are described and compared.
<p>
<p>
 Bi Cuprates
<p>
 The Fermi surface of the Bi-2212 system is systematically studied in a
 paper by D. L. Feng (Stanford) et al. using a variety of photon
 energies. The authors identify strongly nested Fermi surface segments
 that appear to be relevant to the charge-density-wave instability which
 is commensurate with a lattice at 1/8 doping.
<p>
 A preprint by A. Morello (Max Planck) et al. reports on measurements of
 the irreversible magnetization of layered Bi2+xSr2-(x+y)Cu1+yO6+-d (Bi-
 2201) single crystal by means of a capacitative torquemeter for applied
 fields parallel to the a axis up to B_a = 28 T and temperatures down to
 T = 60 mK. The authors observe no magnetization jumps, peak effects, or
 crossovers between different pinning mechanisms. The authors also
 report that the deduced irreversibility field B_[irr] cannot be
 described by the law B_[irr](T) proportional to (1-T/Tc)^n based on flux
 creep, but an excellent agreement is found with the analytical form of
 the melting line of the flux lattice calculated from the Lindemann
 criterion.
<p>
<p>
 Borocarbides
<p>
 The reversible magnetization M of Lu(Ni1-xCox)2B2C with x = 0 and 0.06
 was measured in a broad temperature domain by V. G. Kogan (Ames Lab-Iowa
 State) et al. as a function of field orientation theta in the basal
 crystal plane. The data are interpreted within London theory extended
 for nonlocality of the current-field relation in superconductors. The
 authors report that the dependence M(theta) diminishes on warming,
 vanishes at T* < Tc, and changes sign for T > T*. The authors note that
 the low-T sign is opposite to what is expected from the known angular
 dependence of the upper critical field. Upon doping with Co, the effect
 disappears with decreasing mean-free path, in agreement with theory.
<p>
 In-plane resistance for TmNi2B2C has been measured by D. G. Naugle
 (Texas A&M) et al. as a function of magnitude and direction of the
 magnetic field and temperature, from above the superconducting
 transition temperature at 10.7 K to below the magnetic transition
 temperature T_N = 1.5 K. The superconducting upper critical field
 H_[c2](T) exhibits a large anisotropy and structure in the vicinity of
 T_N, and the magnetoresistance above Tc is large and changes sign as the
 direction of the magnetic field is rotated from in-plane to parallel
 with the c axis.
<p>
 YbNi2B2C is a heavy fermion metal with neither superconductivity nor
 magnetic order, in contrast to other members of the borocarbide group,
 and LuNi2B2C is a superconductor with Tc ~ 16.3 K and no magnetic order.
 A paper by K.D.D. Rathnayaka (Texas A & M) et al. reports transport
 studies on a single-crystal YbxLu(1-x)Ni2B2C that show systematic change
 from a heavy-fermion system to a moderately high-temperature
 superconductor. The authors observe a "giant" thermopower for small x
 to x = 1, i.e., in the transition region from a Kondo alloy to a heavy-
 fermion metal. The authors also report measurements of H_[c2](T,x) for
 x < 0.15.
<p>
<p>
 Other Materials
<p>
 Tunneling experiments were performed by A. I. D'yachenko (Warsaw) et al.
 on single crystals of hole-doped two-leg ladders (SrCa)10Cu17O29 with Tc
 ~~ 75 K, and on textured bulk samples of Bi2Sr2CaCu2O8 (Bi-2212) as
 reference. Experimental results are consistent with the formation of
 zero-energy Andreev bound states at the surface of the superconductors
 and d_[x^2-y^2]-wave symmetry of the order parameter Delta in both
 compounds.
<p>
 A paper by A. K. Pradhan et al. (ISTEC) studies the flux pinning
 behavior of ternary melt-processed (Nd-Eu-Gd)Ba2Cu3Oy superconductors,
 with varying Gd2BaCuO5 second phase (Gd-211) defect concentrations,
 using magneto-transport and magnetization measurements. The critical
 current density Jc is observed to increase with the addition of Gd-211
 particles, displaying a maximum value of Jc for 30% at zero and
 intermediate field range and decrease on further addition of Gd-211
 particles. The authors note that the addition of the second phase and
 its subsequent refinement by Pt addition enhances pinning strength
 significantly.
<p>
 The effect of Sr substitution on the Ba site for Hg0.7Pb0.3Ba2Ca2Cu3Oy
 is studied in a paper by Y. Zhuo (Pohang) et al. From analysis of
 reversible magnetization, the authors find that the fluctuation
 magnetization is much suppressed in the Sr-substituted compound. The
 authors explain this feature in terms of the enhanced interlayer
 coupling strength associated with the Sr substitution and obtain various
 thermodynamic parameters from the theoretical analysis. The study notes
 that the H_[c2](0) of the Sr-substituted sample is about two times that
 of the non-substituted sample.
<p>
 To explain observed intrinsic steps in the flux-flow resistance of c-
 axis-oriented films of Nd2-xCexCuOy (NCCO), O. M. Stoll (Tuebingen) et
 al. propose an electronic structure in the mixed state consisting of
 subbands between the Fermi energy and the superconducting energy gap.
 Two papers by the authors detail studies of electric-field dependence of
 the flux-flow resistance and the electronic vortex structure in NCCO, as
 well as magnetic-field and temperature dependence of the intrinsic
 resistance steps.
<p>
 The physical behavior of the oxygen- and hydrogen-charged
 Eu1.5Ce0.5RuSr2Cu2O10-d are studied in a preprint by I. Felner et al.
 (Hebrew University) by microscopic magnetization and resistivity
 measurements combined with microscopic scanning-tunneling-spectroscopy
 studies. In another paper, the authors use these techniques to study
 the superconductor-to-insulator transition in ceramic
 Eu1.5Ce0.5NbSr2Cu2O10.
<p>
<p>
 Tapes
<p>
 Extended voltage-current characteristics of thirteen optimized
 (Bi,Pb)2223/Ag multifilamentary tapes from four different manufacturers
 were extensively evaluated by L. A. Schwartzkopf et al. (ASC-Madison) to
 extract the field dependent Jc(H), the characteristic field H_p obtained
 from the relation Jc = exp(-H/H_p), and the irreversibility field H*.
 The data show that connectivity and flux pinning make independent
 contributions to the magnitude of Jc. The authors assert that
 Jc(0T,77K) is a flawed characterization parameter because of its heavy
 dependence on self-field, and a better descriptor is Jc(0.1T,77K),
 because it lies outside the self-field and weak-link destruction
 regimes, and clearly within the flux-pinning-controlled domain where the
 connectivity-determined active cross-section-carrying current is
 constant.
<p>
 A preprint by J. W. Anderson (ASC-Madison) et al. studies the influence
 of intermediate rolling deformation on the residual crack network and
 critical current density in multifilamentary (Bi,Pb)2Sr2Ca2Cu3Ox tapes.
 The study concludes that the intermediate deformation is positive in so
 far as it decreases the filament porosity, but it cannot reduce this too
 much without introducing more cracking than is healed in subsequent heat
 treatment. The critical current density thus maximizes at an
 intermediate deformation that counterbalances these two oppositely
 directed influences on filament connectivity.
<p>
 The feasibility of producing biaxially textured YBCO tapes by a dynamic
 magnetic technique is studied in a paper by J.-Y. Genoud (DPMC) et al.
 A biaxially aligned dispersion of orthorhombic Y2Ba4Cu7O15 (Y-247)
 powder was settled on untextured silver substrates, and the tapes were
 then melt-processed to achieve high-Jc YBa2Cu3O7 tapes with CuO as a
 secondary phase. Critical current densities of up to 5,000 A/cm^2 at 77
 K in self field and 1,500 A/cm^2 in 0.5 T at 65 K were obtained in films
 from 20 to 40 micrometers thick. The authors note that, provided
 significant improvements in Jc can be obtained, this method offers an
 alternative to coated tape processes based on epitaxial growth that does
 not require textured substrates.
<p>
<p>
 Films
<p>
 A detailed investigation of atomic and electronic structure of
 superconducting YBCO films is presented in a paper by V. D. Okunev
 (Ukraine) et al. analyzing structural, optical, and transport data. The
 authors show the effect of ordering on the transition temperature Tc.
<p>
 Shapiro voltage steps at voltages V_n = nV_0 (n = integer) have been
 observed by L. Van Look et al. (Leuven) in the voltage-current
 characteristics of a superconducting film with a square lattice of
 perforating microholes (antidots) in the presence of radio frequency
 radiation. The authors assert that the observation reveals the presence
 of mobile interstitial vortices in the superconducting films with
 regular pinning arrays, and that these interstitial vortices, moved by
 the driving current, coexist with immobile vortices strongly pinned at
 the antidots.
<p>
 Detailed transport measurements were made by N. F. Heinig et al.
 (Madison) on YBa2Cu3O7-x thin-film [001] tilt bicrystals with
 misorientation angles of 3, 5, 7, 10, and 20 degrees, encompassing the
 angular regime where the transition from strong to weak coupling occurs.
 The results show that the weak-to-strong coupling transition is
 progressive at 77 K, occurring at misorientation angles between 7
 degrees and 10 degrees in zero field, and between 10 degrees and 15
 degrees in higher magnetic fields. The authors find the shapes of the
 voltage-current characteristics of the 7 degrees [001] bicrystals and
 the ratio of the inter- and intragranular critical current densities to
 be particularly sensitive to individual sample-preparation conditions.
 The authors also do not observe linear decline of the intergranular
 critical current density with misorientation angle predicted from
 present dislocation core overlap models.
<p>
<p>
 Applications
<p>
 A review of the development of a three-axis SQUID magnetometer for
 mineral-prospecting applications is presented in a paper by C. P. Foley
 (CSIRO) et al. The authors note that SQUID systems as B field sensors
 have advantages over coils which are dB/dt type sensors, and discuss the
 importance of these advantages for mineral prospecting in regions with a
 conducting soil cover or overburden that is typical of the Australian
 landscape.
<p>
 A paper by M. Daeumling (NKT Research) theoretically describes a
 superconducting cable consisting of several layers. The model allows
 quantitative calculations of current distributions and ac losses in
 superconducting multilayer power cables. The author identifies two
 regimes as being important: a low-current regime in which the current
 distribution is determined by the inductance matrix of the cable, and a
 high-current regime in which one or more layers have reached their
 critical current. The author identifies a new loss mechanism due to
 saturation of current, and makes comparisons between measured data and
 the model.
<p>
 The prospects of operating rapid single flux quantum (RSFQ) circuits
 with high-Tc superconductive materials have been studied quantitatively
 with numerical inductance computations. H. Toepfer and H. F. Uhlmann
 (Technical University of Ilmenau) have, in this paper, provided
 inductance calculations for typical layout arrangements that can provide
 insight in regard to upper limits for the feasible operating temperature
 ranges.
<p>
 A balanced comparator has been fabricated and tested in a three HTS
 layer technology by A. H. Sonnenberg et al. (Twente) for use as an
 element of RSFQ circuits. The junctions and inductances are located on
 a buried ground plane in order to reduce the inductance values, and the
 authors have chosen for a buried ground plane in order to avoid heating
 the ramp-edge junction to deposition temperatures. Correct operation
 has been verified by dc measurements of the switching properties.
<p>
 A preprint by L. Hao (National Physical Laboratory) et al. reports on
 the design and operation of HTS resistive SQUIDs for potential
 application in Josephson noise thermometry above helium temperatures.
<p>
<p>
 Vortices
<p>
 Equations describing a single vortex in a charged Bose liquid at zero
 temperature are derived in a paper by A. S. Alexandrov (Loughborough).
 The zero-temperature coherence length, magnetic field penetration depth,
 vortex structure and energy, and lower critical field are calculated.
 The author reports that the vortex differs from that in type-II BCS
 superconductors or in neutral superfluids in that this system has a
 charged core with electric field inside the core. The author asserts
 that while the magnetic field profile is the same as in the BCS case,
 the electric field associated with the vortex could provide evidence for
 charged bosons in the high-temperature superconductors.
<p>
 A paper by Y. Cao and Z. Jiao (Zhejiang) numerically investigates the
 influence of pinning and thermal fluctuation effects on the motion of
 the 2D vortex lattice under the action of an external driving force.
<p>
<p>
 Theory
<p>
 A microscopic theory is developed in a paper by W. M. Zhang (Taiwan) to
 describe the close proximity between the insulating antiferromagnetic
 (AF) order and the d-wave superconducting order in the cuprates. The
 author shows that the cuprate ground states form a configuration of
 coherent pairing states consisting of extended singlet Cooper pairs and
 triplet pi pairs, which can simultaneously describe AF and d-wave
 orders.
<p>
 For the case of s+id symmetry of the superconducting gap, D. Quesada et
 al. (La Habana) calculate the temperature dependence of the specific
 heat C_[es] and the thermodynamic critical magnetic field H_c. The
 authors observe a double peak transition on C_[es](T) in the mixed
 regime while single-peak behavior is recovered for the purely symmetric
 (s or d) state. C_[es] exhibits a quadratic-law behavior at low
 temperatures for a d-wave gap and typical exponential attenuation for
 the s wave. The temperature dependence of H_c shows a clear phase
 transition of second order at temperatures where the d-wave component
 becomes negligible. These results are compared to other work.
<p>
 The temperature dependence of specific heat, susceptibility, penetration
 depth, and thermal conductivity of a coupled (d_[x^2-y^2]+is)-wave BCS
 superconductor is studied numerically in a paper by A. Ghosh and S. K.
 Adhikari (Brazil) in the presence of a weak s-wave component (a) on
 square lattice and (b) on a lattice with orthorhombic distortion. The
 authors observe a less-ordered superconducting phase created in d_[x^2-
 y^2] wave as the temperature is lowered past Tc, which changes to a more
 ordered phase in (d_[x^2-y^2]+is) wave at T_[c1], which manifests as two
 second-order phase transitions.
<p>
 The phase diagram of order parameters for pairing and phase coherence in
 hole-doped cuprates is discussed in a preprint by A. Mourachkine
 (Brussels). By examining recent neutron-scattering data on hole-doped
 cuprates and heavy fermions, the author concludes that the coherent gap
 in hole-doped cuprates most likely has magnetic origin and scales with
 Tc as 2Delta_c/k_BTc = 5.4. The author discusses a model of hole-doped
 cuprates and the symmetries of the two order parameters.
<p>
<p>
 Reviews
<p>
 A brief review of the first thirteen years of high-Tc superconductivity
 research is summarized in a paper by D. Pavuna (Lausanne). The author
 addresses some of the most relevant recent results and open questions in
 the field, by discussing the observed phenomena in the rather complex
 electronic phase diagram of high-Tc oxides. (21 refs.).
<p>
 A paper by C. R. Hu (TCSUH) provides an update of the many effects and
 novel consequences of the midgap states predicted to exist in d-wave
 superconductors. (29 refs.).
<p>
 Reviewing the experimental work of the normal state of HTS materials, L.
 Zhang and Q. Han (Beijing) have put forward nine points to be considered
 in any theory of the normal state. The authors argue that the two-
 dimensional two-subsystem model is qualitatively consistent with all
 these points. (23 refs.).
<p>
 An exhaustive review of problems where topological ideas may play a role
 is presented by E. Akkermans (Orsay) and K. Mallick (Haifa). In two
 sections of this review, the authors discuss the problem of
 superconducting billiards within the Ginzburg-Landau approximation. (49
 refs.).
<p>
<p>
<p>
 Contributed by Sreeparna Mitra
 <hr>
<p>
 Contents: Preprints begin on page 5; Coming Events begin on page 10;
 Resources are on page 11; and FYI is on page 11.
<p>
<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>
 <hr>
<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>
 E. Akkermans and K. Mallick, "Geometrical Description of Vortices in
 Ginzburg-Landau Billiards." Presented at Les Houches Summer School,
 Topological Aspects of Low Dimensional Systems, Les Houches, France,
 July 1998. Laboratoire de Physique des Solides, LPTMS, F-91405 Orsay
 Cedex, FRANCE; K. Mallick's e-mail at Centre d'Etudes Nucleaires de
 Saclay <a href="mailto:mallick@spht.saclay.cea.fr">mallick@spht.saclay.cea.fr;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9907441">http://xxx.lanl.gov/abs/cond-mat/9907441.</a>
<p>
 A. S. Alexandrov, "Vortex in the Charged Bose Liquid." Submitted to
 Phys. Rev. B. Department of Physics, Loughborough University,
 Loughborough Leicestershire LE11 3TU, UNITED KINGDOM; telephone +44 1509
 223303; telefax +44 1509 223985. 74.20.-z.
<p>
 D. L. Anastassopoulos, G. D. Priftis, A. A. Vradis, J. G. Noudem, and R.
 Tournier, "Compton Profile Anisotropies in Bi1.6Pb0.4Sr2Ca2Cu3O10+x
 Superconductor." To be published in Physica C (in press). Department
 of Physics, University of Patras, GR 26 500 Patras, GREECE; telefax +30
 61 997 481; e-mail <a href="mailto:anastdim@physics.upatras.gr">anastdim@physics.upatras.gr.</a> Key words: inelastic
 scattering, electronic momentum, Bi1.6Pb0.4Sr2Ca2Cu3O10-x. 74.25.Jb;
 32.80.Cy.
<p>
 J. W. Anderson, X. Y. Cai, M. Feldmann, A. Polyanskii, J. Jiang, J. A.
 Parrell, K. R. Marken, S. Hong, and D. C. Larbalestier, "The Influence
 of Intermediate Roll Characteristics on the Residual Crack Density and
 Critical Current Density in Multifilamentary (Bi,Pb)2Sr2Ca2Cu3Ox Tapes."
 Applied Superconductivity Center, University of Wisconsin-Madison, 1500
 Engineering Drive, Madison, WI 53706; D. C. Larbalestier's telephone
 (608) 263-2194; telefax (608) 263-1087; e-mail <a href="mailto:larbales@engr.wisc.edu">larbales@engr.wisc.edu.</a>
<p>
 F.-Im. Buchholz and W. Kessel, "RSFQ Impulse Logic Circuitry for Future
 Applications in High Frequency Metrology." To be published in Physica C
 (in press). Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-
 38116 Braunschweig, GERMANY. Key words: RSFQ logic, Josephson effect,
 superconducting electronics, high-frequency metrology.
<p>
 Yigang Cao and Zhengkuan Jiao, "Pinning and Thermal Fluctuation Effects
 on the Two-Dimensional Vortex Lattice: A Numerical Study." To be
 published in Physica C (in press). Department of Physics, Zhejiang
 University, Hangzhou 310027, PEOPLE'S REPUBLIC OF CHINA; e-mail
 <a href="mailto:lwanf@zimp.zju.edu.cn">lwanf@zimp.zju.edu.cn.</a> Key words: pinning, thermal fluctuation, vortex
 lattice.
<p>
 O. S. Chana, D.M.C. Hyland, R. J. Kinsey, W. E. Booij, M. G. Blamire,
 C.R.M. Grovenor, D. Dew-Hughes, and P. A. Warburton, "Josephson Effects
 in Misaligned Tl-2212 Films." To be published in Physica C. Contact
 P. A. Warburton, Department of Electronic Engineering, King's College
 London, Strand, London WC2R 2LS, UNITED KINGDOM; telephone +44 207 848
 2444; telefax +44 207 848 2932; e-mail <a href="mailto:paul.warburton@kcl.ac.uk">paul.warburton@kcl.ac.uk.</a> Key
 words: intrinsic Josephson effect, Tl2Ba2CaCu2O8, misaligned films, SIS
 tunnelling.
<p>
 Mark W. Coffey, "Theory of Inverse Magnetic Force Microscopy of
 Superconductors in Half-Space Geometry." To be published in Phys. Rev.
 Lett. Department of Physics, University of Colorado, Boulder, CO 80309.
 74.20.De; 02.30.-f; 74.25.Ha; 74.25.Nf.
<p>
 F. M. Costa, R. F. Silva, and J. M. Vieira, "Phase Transformation
 Kinetics During Thermal Annealing of LFZ Bi-Sr-Ca-Cu-O Superconducting
 Fibers in the Range 800-870^oC." To be published in Physica C (in
 press). Departamento de Fisica, Universidade de Aveiro, 3810 Aveiro,
 PORTUGAL; telephone +351 34 370954; telefax +351 34 24965; e-mail
 <a href="mailto:flor@fis.ua.pt">flor@fis.ua.pt.</a> Key words: phase formation, diffusion, BSCCO,
 superconductors, fibers.
<p>
 M. Daeumling, "A Model for the Current Distribution and ac Losses in
 Superconducting Multilayer Power Cables." To be published in
 Cryogenics. NKT Research Center, Priorparken 878, DK-2605 Brondby,
 DENMARK.
<p>
 A. I. D'yachenko, V. Yu. Tarenkov, R. Szymczak, A. V. Abal'oshev, I. S.
 Abal'osheva, S. J. Lewandowski, and L. Leonyuk, "d-Wave
 Superconductivity of Hole Doped (SrCa)10Cu17O29 Ladder Compound."
 Submitted to Phys. Rev. B. Contact S. J. Lewandowski, Institute of
 Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, PL-02668
 Warsaw, POLAND; e-mail <a href="mailto:lewan@ifpan.edu.pl">lewan@ifpan.edu.pl.</a> 74.50.+r; 74.72.Hs;
 74.72.Jt.
<p>
 I. Felner, U. Asaf, Y. Levi, and O. Millo, "The Effect of Oxygen and
 Hydrogen on Weak Magnetism and Superconductivity in
 Eu1.5Ce0.5RuSr2Cu2O10-d." Submitted to Phys. Rev. B. Racah Institute
 of Physics, Hebrew University of Jerusalem, Jerusalem 91904, ISRAEL;
 telephone +972 2 658 5752; telefax +972 2 658 6347; e-mail
 <a href="mailto:israela@vms.huji.ac.il">israela@vms.huji.ac.il.</a> 74.10.+v; 74.62.Bf; 75.50.Ee; 76.80.+y.
<p>
 D. L. Feng, W. J. Zheng, K. M. Shen, D. H. Lu, F. Ronning, J.-i.
 Shimoyama, K. Kishio, G. Gu, Dirk Van der Marel, and Z.-X. Shen, "Fermi
 Surface of Bi2212: A Systematic Revisit and Identification of Almost
 Perfectly Nested Fermi Surface Segments." Submitted to Phys. Rev. Lett.
 Department of Physics, Applied Physics and Stanford Synchrotron
 Radiation Laboratory, Stanford University, Stanford, CA 94305; e-mail
 <a href="mailto:dlfeng@stanford.edu">dlfeng@stanford.edu;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9908056">http://xxx.lanl.gov/abs/cond-mat/9908056.</a> 71.18.+y; 74.72.Hs; 79.60.Bm.
<p>
 C. P. Foley, K. E. Leslie, R. Binks, C. Lewis, W. Murray, G. J.
 Sloggett, S. Lam, B. Sankrithyan, N. Savvides, A. Katzaros, K.-H.
 Mueller, E. E. Mitchell, J. Pollock, J. Lee, D. L. Dart, R. R. Barrow,
 M. Asten, A. Maddever, G. Panjkovic, Mark Downey, C. Hoffman, and R.
 Turner, "Field Trials Using HTS SQUID Magnetometers for Ground-Based and
 Airborne Geophysical Applications." To be published in IEEE Trans.
 Appl. Supercond. CSIRO Telecommunications and Industrial Physics, P.O.
 Box 218, Lindfield NSW 2070, AUSTRALIA; telephone +61 2 9413 7413;
 telefax +61 2 9413 7202; e-mail <a href="mailto:foley@tip.csiro.au">foley@tip.csiro.au.</a>
<p>
 Jean-Yves Genoud, Mike Staines, Anne Mawdsley, Veljko Manojlovic, and
 William Quinton, "Biaxially Textured YBCO Coated Tape Prepared Using
 Dynamic Grain Alignment." To be published in Supercond. Sci. & Technol.
 Institute of Physics, Departement de Physique de la Matiere Condensee
 (DPMC), CH-1211 Geneve 4, SWITZERLAND; e-mail jean-
 <a href="mailto:yves.genoud@physics.unige.ch">yves.genoud@physics.unige.ch.</a>
<p>
 Angsula Ghosh and Sadhan K. Adhikari, "Two Phase Transitions in (d_[x^2-
 y^2] + is)-Wave Superconductors." To be published in Physica C (in
 press). Contact Sadhan K. Adhikari, Instituto de Fisica Teorica,
 Universidade Estadual Paulista, Rua Pamplona 145, 01405-900 Sao Paulo,
 S.P., BRAZIL; telephone +55 11 3177 9071; telefax +55 11 3177 9080; e-
 mail <a href="mailto:adhikari@ift.unesp.br">adhikari@ift.unesp.br;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9908101">http://xxx.lanl.gov/abs/cond-mat/9908101.</a> Key words: (d_[x^2-y^2] +
 is)-wave superconductor, specific heat, susceptibility, thermal
 conductivity. 74.20.Fg; 74.62.-c; 74.25.Bt.
<p>
 R. W. Giannetta, N. H. Tea, F.A.B. Chaves, S. Rao, M. B. Salamon, A. M.
 Kini, H. H. Wang, U. Geiser, J. Schlueter, M. W. Trawick, and J. C.
 Garland, "Lockin Transition, Irreversibility Field, and Josephson Vortex
 Penetration Depth in kappa-(ET)2Cu[N(CN)2]Br." To be published in
 Physica C (in press). Department of Physics and The Science and
 Technology Center for Superconductivity, University of Illinois at
 Urbana-Champaign, 1110 W. Green, Urbana, IL 61801; telephone (217) 333-
 5882; telefax (217) 333-9819; e-mail <a href="mailto:russg@uiuc.edu">russg@uiuc.edu.</a> Key words: kappa-
 (ET)2Cu[N(CN)2]Br, lockin effect, Josephson vortices, irreversibility
 line, penetration depth, lower critical field. 74.60.Ge; 74.25.Ha;
 74.70.Kn.
<p>
 J.-C. Grivel, Yu. Eltsev, M. Andersson, OE. Rapp, A. Erb, E. Walker, and
 R. Fluekiger, "First-Order Melting Transition Observed from Resistivity
 Measurements in Ultra-Pure YBa2Cu3O7-d Single Crystals with High Twin
 Boundary Density." To be published in Physica C (in press). Materials
 Department, Riso National Laboratory, DK-4000 Roskilde, DENMARK. Key
 words: flux pinning, magneto-resistance, melting transition.
<p>
 B. Guettler, O. Yu. Gorbenko, M. A. Novozhilov, S. V. Samoilenkov, V. A.
 Amelichev, G. Wahl, and H. W. Zandbergen, "Application of Raman
 Spectrometry for the Characterization of Complex Oxide Thin Films Grown
 by MOCVD." To be published in the Proc. of EuroCVD'99, Barcelona,
 Spain, September 1999. Contact S. V. Samoilenkov, Department of
 Chemistry, Moscow State University, 119899 Moscow, RUSSIA; telefax +7
 095 9391492; e-mail <a href="mailto:sam@inorg.chem.msu.ru">sam@inorg.chem.msu.ru.</a>
<p>
 L. Hao, J. C. Gallop, J. C. Macfarlane, D. A. Peden, and C. M. Pegrum,
 "Simulations and Experiments on HTS Resistive SQUIDs." Presented at the
 Fourth European Conf. on Appl. Supercond. (EUCAS'99), Barcelona, Spain,
 Sept. 14-17, 1999. Contact J. C. Macfarlane, National Physical
 Laboratory, Teddington TW11 0LW, Middlesex, UNITED KINGDOM; telephone
 +44 181 977 3222; telefax +44 181 943 2155; e-mail
 <a href="mailto:john.macfarlane@npl.co.uk">john.macfarlane@npl.co.uk.</a>
<p>
 N. F. Heinig, R. D. Redwing, J. E. Nordman, and D. C. Larbalestier, "The
 Strong to Weak Coupling Transition in Low Misorientation Angle Thin Film
 YBa2Cu3O7-x Bicrystals." To be published in Phys. Rev. B. 810
 Lexington Ave. #C, El Cerrito, CA 94530; telephone (510) 527-5324; e-
 mail <a href="mailto:heinig@argon.eecs.berkeley.edu">heinig@argon.eecs.berkeley.edu.</a> 74.80.Bj; 74.72.Bk; 74.60.Jg;
 74.50.+r.
<p>
 C. R. Hu, "Update on the Numerous Novel Consequences of the Midgap
 States in Unconventional High-Tc Superconductors." Preprint #99:061; to
 be published in Int. J. Mod. Phys. B: Proc. of the Second Int. Conf. on
 New Theories, Discoveries and Applications of Superconductors and
 Related Materials (New3SC-2), Las Vegas, Nev., May 31-June 4, 1999.
 Department of Physics, Texas A&M University, College Station, TX 77843-
 4242; 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 <a href="mailto:preprints@www.tcs.uh.edu">preprints@www.tcs.uh.edu.</a> Key words: d-
 wave superconductors, high-Tc superconductors, midgap states, novel
 consequences, update.
<p>
 Prafulla K. Jha and Sankar P. Sanyal, "Lattice Vibrational Properties of
 Superconducting Sr2RuO4." To be published in Physica C (in press).
 Department of Physics, Faculty of Science, M. S. University of Baroda,
 Vadodara 390 002, INDIA. Key words: Sr2RuO4, lattice vibrations,
 phonon. 63.10.+a; 63.20.Dj, 25.40.Fq.
<p>
 Hikaru Kawamura, "Simulation Studies on the Stability of the Vortex-
 Glass Order." Faculty of Engineering and Design, Kyoto Institute of
 Technology, Kyoto 606-8585, JAPAN; e-mail <a href="mailto:kawamura@hiei.kit.ac.jp">kawamura@hiei.kit.ac.jp;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/9907355">http://xxx.lanl.gov/abs/cond-mat/9907355.</a>
 74.60.Ge; 74.62.Dh; 64.60.Fr.
<p>
 V. A. Khodel and M. V. Zverev, "The Interplay Between Flattening and
 Damping of Single Particle Spectra in Strongly Correlated Fermi
 Systems." Kurchatov Institute of Atomic Energy, 123182 Moscow, RUSSIA;
 M. V. Zverev's e-mail <a href="mailto:zverev@pretty.mbslab.kiae.ru">zverev@pretty.mbslab.kiae.ru;</a> preprint also
 available at <a href="http://xxx.lanl.gov/abs/cond-mat/9907061">http://xxx.lanl.gov/abs/cond-mat/9907061.</a>
<p>
 V. G. Kogan, S. L. Bud'ko, P. C. Canfield, and P. Miranovic, "Nonlocal
 Effects in Angular Dependence of In-Plane Magnetization of Tetragonal
 Superconductors." Ames Laboratory-USDOE and Department of Physics, Iowa
 State University, Ames, IA 50011-3020; telephone (515) 294-8080; telefax
 (515) 294-0689; e-mail <a href="mailto:kogan@ameslab.gov">kogan@ameslab.gov.</a> 74.25.Ha; 74.60.-w.
<p>
 N. Kuroda, N. Ishikawa, Y. Chimi, A. Iwase, S. Okayasu, H. Ikeda, R.
 Yoshizaki, and T. Kambara, "Vortex Dynamics in Bi2(Sr,La)2CuO6+d and
 Bi2Sr2CaCu2O8+d Single Crystals with Columnar Defects." To be published
 in Physica C (in press). Room 2-239, Department of Materials Science,
 Kenkyu-nitou Building, Japan Atomic Energy Research Institute, Tokai-
 mura, Ibaraki 319-1195, JAPAN; telephone +81 29 282 5472; telefax +81 29
 282 6716; e-mail <a href="mailto:kuroda@popsvr.tokai.jaeri.go.jp">kuroda@popsvr.tokai.jaeri.go.jp.</a> Key words: ac
 susceptibility, heavy-ion irradiation, vortex dynamics, Bi-2201 single
 crystal, Bi-2212 single crystal. 74.60.Ge.
<p>
 H. K. Lee and T. Y. Kim, "Ion Size Effect on Tc in (Pb,V)Sr2(Ca,R)Cu2Oz
 (R=Sm, Gd, Dy, Er and Lu) Systems." To be published in Physica C (in
 press). Department of Physics, Kangwon National University, Chunchon
 200-701, SOUTH KOREA; telefax +82 361 257 9689; e-mail
 <a href="mailto:hklee221@cc.kangwon.ac.kr">hklee221@cc.kangwon.ac.kr.</a> Key words: superconducting transition
 temperature, lattice constants, Pb-based 1212 systems. 74.72.Jt;
 74.62.-c; 74.62.Dh.
<p>
 Y. Levi, I. Felner, U. Asaf, and O. Millo, "Percolative Superconductor-
 to-Insulator Transition in Eu1.5Ce0.5NbSr2Cu2O10." Submitted to Phys.
 Rev. B. Contact O. Millo, Racah Institute of Physics, Hebrew University
 of Jerusalem, Jerusalem 91904, ISRAEL; e-mail <a href="mailto:milode@vms.huji.ac.il">milode@vms.huji.ac.il.</a>
 74.50.+r; 74.80.Fp; 74.20.Mn.
<p>
 M. Luszczek, W. Sadowski, T. Klimczuk, J. Olchowik, B. Susla, and R.
 Czajka, "Superconductivity in PrBa2Cu3O7-d Single Crystals After High-
 Temperature Thermal Treatment." To be published in Physica C (in
 press). Department of Physics and Mathematics, Technical University of
 Gdansk, G. Narutowicza 11/12, Gdansk 80952, POLAND. Key words:
 superconductivity, PrBa2Cu3O7-d. 74.20.Fg.
<p>
 M. Machida, T. Koyama, A. Tanaka, and M. Tachiki, "Collective Dynamics
 of Josephson Vortices in Intrinsic Josephson Junctions: Exploration of
 In-Phase Locked Superradiant Vortex Flow States." Submitted to Phys.
 Rev. B. Center for Promotion of Computational Science and Engineering,
 Japan Atomic Energy Research Institute, 2-2-54 Nakameguro, Meguro-ku,
 Tokyo 153, JAPAN; telefax +81 3 5723 2537; e-mail
 <a href="mailto:mac@sugar.tokai.jaeri.go.jp">mac@sugar.tokai.jaeri.go.jp;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9907136">http://xxx.lanl.gov/abs/cond-mat/9907136.</a> 74.50.+r; 74.60.Ge; 74.80.Dm;
 85.25.Cp.
<p>
 A. Morello, A.G.M. Jansen, R. S. Gonnelli, and S. I. Vedeneev, "The
 Irreversibility Line of Overdoped Bi2+xSr2-(x+y)Cu1+yO6+-d at Ultra-Low
 Temperatures and High Magnetic Fields." INFM-Dipartimento di Fisica,
 Politecnico di Torino, Corso Duca degli Abruzzi 24, I-10129 Torino,
 ITALY; R. S. Gonnelli's telephone +39 011 564 7322; telefax +39 011 564
 7399; e-mail <a href="mailto:gonnelli@polito.it">gonnelli@polito.it;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9907347">http://xxx.lanl.gov/abs/cond-mat/9907347.</a> 74.60.Ge; 74.72.Hs.
<p>
 A. Mourachkine, "The Order Parameters for Pairing and Phase Coherence in
 Cuprates; the Magnetic Origin of the Coherent Gap: The MCS Model of
 High-Tc Superconductivity." To be published in J. Low Temp. Phys.:
 Proc. of the Int. Conf. on Phys. and Chem. of Molecular and Oxide
 Supercond. (MOS'99), Stockholm, Sweden, July 28-Aug. 2, 1999. Service
 de Physique des Solides, Universite Libre de Bruxelles, CP233, Boulevard
 du Triomphe, B-1050 Brussels, BELGIUM; telephone +32 2 650 5751; telefax
 +32 2 650 5916; e-mail <a href="mailto:anmourac@ulb.ac.be">anmourac@ulb.ac.be;</a> preprint also available at
 <a href="http://xxx.lanl.gov/abs/cond-mat/9908052">http://xxx.lanl.gov/abs/cond-mat/9908052.</a> 74.25.Dw; 74.72.-h; 74.20.Mn.
<p>
 D. G. Naugle, K.D.D. Rathnayaka, K. Clark, and P. C. Canfield, "Critical
 Field and Magnetoresistance of Single-Crystal TmNi2B2C." Preprint
 #99:052; to be published in Int. J. Mod. Phys. B: Proc. of the Second
 Int. Conf. on New Theories, Discoveries and Applications of
 Superconductors and Related Materials (New3SC-2), Las Vegas, Nev., May
 31-June 4, 1999. Department of Physics, Texas A&M University, College
 Station, TX 77843-4242; 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
 <a href="mailto:preprints@www.tcs.uh.edu">preprints@www.tcs.uh.edu.</a>
<p>
 V. D. Okunev, Z. A. Samoilenko, A. Abal'oshev, P. Gierlowski, A. Klimov,
 and S. J. Lewandowski, "Atomic Order, Electron Structure and Critical
 Parameters of Epitaxial YBaCuO Films." To be published in Appl. Phys.
 Lett. Contact S. J. Lewandowski, Institute of Physics, Polish Academy
 of Sciences, Al. Lotnikow 32/46, PL-02668 Warsaw, POLAND; e-mail
 <a href="mailto:lewan@ifpan.edu.pl">lewan@ifpan.edu.pl.</a> 74.76.Bz; 81.15.Fg; 74.80.Bj; 74.25.Gz.
<p>
 Akira Ono, "Preparation of Overdoped Superconducting (Ba,Sr)2TmCu3Oz."
 To be published in Physica C (in press). National Institute for
 Research in Inorganic Materials, 1-1 Namiki, Tsukuba, Ibaraki 305-0044,
 JAPAN; telephone +81 0298 52 7449; telefax +81 0298 52 7449; e-mail
 <a href="mailto:ono@nirim.go.jp">ono@nirim.go.jp.</a> Key words: BaSrYCu3Oz, BaSrTmCu3Oz, overdoping,
 oxygenation, hole distribution.
<p>
 Davor Pavuna, "First 13 Years of High-Tc: Brief Review and Open
 Questions." To be published in Int. J. Mod. Phys. B: Proc. of the
 Second Int. Conf. on New Theories, Discoveries and Applications of
 Superconductors and Related Materials (New3SC-2), Las Vegas, Nev., May
 31-June 4, 1999. Department of Physics, Ecole Polytechnique Federale de
 Lausanne, IPA-EPFL, CH-1015 Lausanne, SWITZERLAND; e-mail
 <a href="mailto:pavuna@epfl.ch">pavuna@epfl.ch.</a>
<p>
 G. Plesch, A. Buckuliakova, A. Cigan, J. Manka, F. Hanic, and S. Buchta,
 "Measurement of Magnetic Properties and Microstructure of Melt Textured
 YBa2Cu3O7-d Samples Prepared by Various Techniques." To be published in
 the Proc. of the 2nd Int. Conf. on Measurement (MEASUREMENT'99),
 Smolenice Castle, Slovak Republic, April 26-29, 1999. 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>
<p>
 A. K. Pradhan, M. Muralidhar, M. R. Koblischka, M. Murakami, K. Nakao,
 and N. Koshizuka, "Flux Pinning in Melt-Processed Ternary (Nd-Eu-
 Gd)Ba2Cu3Oy Superconductors with Gd2BaCuO5 Addition." To be published
 in J. Appl. Phys. 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> 74.60.Ge; 74.60.Jg; 74.62.Dh.
<p>
 D. Quesada, R. Pena, and C. Trallero-Giner, "Thermodynamic Functions
 Within the Van Hove BCS Model: Symmetry Mixing Effects." To be
 published in Physica C (in press). Departamento de Fisica Teorica,
 Facultad de Fisica, Universidad de La Habana, La Habana 10 400, CUBA;
 telephone +53 7 70 4270; telefax +53 7 33 3758; e-mail
 <a href="mailto:dques@ff.oc.uh.cu">dques@ff.oc.uh.cu.</a> Key words: Van Hove, BCS, symmetry mixing,
 thermodynamics. 74.20.Fg; 74.25.Bt; 74.25.Jb.
<p>
 K.D.D. Rathnayaka, D. G. Naugle, S. Li, M. C. de Andrade, R. P. Dickey,
 A. Amann, M. B. Maple, S. L. Bud'ko, P. C. Canfield, and W. P.
 Beyermann, "Transition from Heavy Fermion Metal to 16K Superconductor in
 Single Crystal YbxLu(1-x)Ni2B2C: Transport Studies." Preprint #99:051;
 to be published in Int. J. Mod. Phys. B: Proc. of the Second Int. Conf.
 on New Theories, Discoveries and Applications of Superconductors and
 Related Materials (New3SC-2), Las Vegas, Nev., May 31-June 4, 1999.
 Department of Physics, Texas A&M University, College Station, TX 77843-
 4242; 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 <a href="mailto:preprints@www.tcs.uh.edu">preprints@www.tcs.uh.edu.</a>
<p>
 S. V. Samoylenkov, O. Yu. Gorbenko, I. E. Graboy, A. R. Kaul, O. Stadel,
 G. Wahl, and H. W. Zandbergen, "Phase Relations in Thin Epitaxial Films
 of Complex Oxides Prepared by MOCVD." To be published in the Proc. of
 EuroCVD'99, Barcelona, Spain, September 1999. Department of Chemistry,
 Moscow State University, 119899 Moscow, RUSSIA; telefax +7 095 9391492;
 e-mail <a href="mailto:sam@inorg.chem.msu.ru">sam@inorg.chem.msu.ru.</a>
<p>
 S. V. Samoylenkov, O. Yu. Gorbenko, I. E. Graboy, A. R. Kaul, H. W.
 Zandbergen, and E. Connolly, "Secondary Phases in (001)RBa2Cu3O7-d
 Epitaxial Thin Films." To be published in Chem. Mater. Department of
 Chemistry, Moscow State University, 119899 Moscow, RUSSIA; telefax +7
 095 9391492; e-mail <a href="mailto:sam@inorg.chem.msu.ru">sam@inorg.chem.msu.ru.</a> Key words: epitaxy, R-Ba-
 Cu-O, phase relations, electron microscopy, oxide superconductors.
<p>
 A. Schilling, M. Willemin, C. Rossel, H. Keller, R. A. Fisher, N. E.
 Phillips, U. Welp, W. K. Kwok, R. J. Olsson, and G. W. Crabtree,
 "Anisotropy of the Magnetization Discontinuity at the Vortex-Lattice
 Melting in Untwinned YBa2Cu3O7-d." To be published in Phys. Rev. B.
 Physik Institut der Universitaet Zurich, Winterthurerstrasse 190, CH-
 8057 Zurich, SWITZERLAND; telephone +41 1 635 5803; telefax +41 1 635
 5704; e-mail <a href="mailto:schillin@physik.unizh.ch">schillin@physik.unizh.ch.</a> 74.25.Bt; 74.25.Ha; 74.60.Ge;
 75.30.Gw.
<p>
 L. A. Schwartzkopf, J. Jiang, X. Y. Cai, D. Apodaca, and D. C.
 Larbalestier, "The Use of the In-Field Critical Current Density,
 Jc(0.1T), as a Better Descriptor of (Bi,Pb)2223/Ag Tape Performance."
 Submitted to Appl. Phys. Lett. Applied Superconductivity Center,
 University of Wisconsin-Madison, 1500 Engineering Drive, Madison, WI
 53706; D. C. Larbalestier's telephone (608) 263-2194; telefax (608) 263-
 1087; e-mail <a href="mailto:larbales@engr.wisc.edu">larbales@engr.wisc.edu.</a>
<p>
 A. H. Sonnenberg, G. J. Gerritsma, and H. Rogalla, "Balanced Comparator
 Fabricated in Ramp Edge Technology." To be published in Physica C (in
 press). Low Temperature Division, Faculty of Applied Physics,
 University of Twente, P.O. Box 217, 7500 AE Enschede, THE NETHERLANDS;
 e-mail <a href="mailto:a.h.sonnenberg@tn.utwente.nl">a.h.sonnenberg@tn.utwente.nl.</a> Key words: balanced comparator,
 gray zone, buried ground plane, ramp edge junction.
<p>
 T. Startseva, T. Timusk, M. Okuya, T. Kimura, and K. Kishio, "The ab-
 Plane Optical Conductivity of Overdoped La2-xSrxCuO4 for x=0.184 and
 0.22: Evidence of a Pseudogap." To be published in Physica C (in
 press). Contact T. Timusk, Department of Physics and Astronomy,
 McMaster University, 1280 Main Street West, Hamilton, Ontario, CANADA
 L8S 4M1; telephone (905) 525-9140; telefax (905) 546-1252; e-mail
 <a href="mailto:timusk@mcmaster.ca">timusk@mcmaster.ca.</a> Key words: pseudogap, infrared spectroscopy, far-
 infrared spectra, optical reflectivity. 74.25.Gz; 74.72.Dn.
<p>
 O. M. Stoll, R. P. Huebener, S. Kaiser, and M. Naito, "Electric Field
 Dependence of the Flux-Flow Resistance and the Electronic Vortex
 Structure in the Cuprate Superconductor Nd2-xCexCuOy." To be published
 in J. Low Temp. Phys. Physikalisches Institut, Lehrstuhl
 Experimentalphysik II, Universitaet Tuebingen, Morgenstelle 14, D-72076
 Tuebingen, GERMANY. 74.25.Fy; 74.60.Ge; 74.72.Jt.
<p>
 O. M. Stoll, R. P. Huebener, S. Kaiser, and M. Naito, "Magnetic Field
 and Temperature Dependence of the Intrinsic Resistance Steps in the
 Mixed State of the Cuprate Superconductor Nd2-xCexCuOy." To be
 published in Phys. Rev. B. Physikalisches Institut, Lehrstuhl
 Experimentalphysik II, Universitaet Tuebingen, Morgenstelle 14, D-72076
 Tuebingen, GERMANY. 74.25.Fy; 74.60.Ge; 74.72.Jt.
<p>
 Hannes Toepfer and Hermann F. Uhlmann, "Inductances in Rapid Single Flux
 Quantum Circuits with High-Tc Superconductors: A Comparative Study."
 To be published in Physica C (in press). Department of Fundamentals and
 Theory of Electrical Engineering, Technical University of Ilmenau, PF
 100565, D-98684 Ilmenau, GERMANY. Key words: rapid single flux
 quantum, inductance computations, circuit design.
<p>
 C. Vaast-Paci, J. A. Hodges, P. Bonville, and A. Forget, "Local Fields
 in YBa2Cu3O7-d Measured on [170]^Yb^[3+] Mossbauer Probes: I. Volume
 and Surface Penetration Lengths." To be published in Physica C (in
 press). Contact J. A. Hodges, DRECAM-SPEC, Centre d'Etudes de Saclay,
 F-91191 Gif sur Yvette Cedex, FRANCE; telephone +33 1 6908 7438; telefax
 +33 1 6908 8786; e-mail <a href="mailto:hodges@spec.saclay.cea.fr">hodges@spec.saclay.cea.fr.</a> Key words:
 YBa2Cu3Ox, Mossbauer spectroscopy, penetration depth. 76.80.+y.
<p>
 C. Vaast-Paci, J. A. Hodges, P. Bonville, and A. Forget, "Local Fields
 in YBa2Cu3O7-d Measured on [170]^Yb^[3+] Mossbauer Probes: II. Vortex
 Alignment in the Field-Cooled and Zero Field-Cooled Configurations." To
 be published in Physica C (in press). Contact J. A. Hodges, DRECAM-
 SPEC, Centre d'Etudes de Saclay, F-91191 Gif sur Yvette Cedex, FRANCE;
 telephone +33 1 6908 7438; telefax +33 1 6908 8786; e-mail
 <a href="mailto:hodges@spec.saclay.cea.fr">hodges@spec.saclay.cea.fr.</a> Key words: YBa2Cu3O7, Mossbauer
 spectroscopy, flux lattice, flux pinning. 76.80.+y; 74.60.Ge.
<p>
 L. Van Look, E. Rosseel, M. J. Van Bael, K. Temst, V. V. Moshchalkov,
 and Y. Bruynseraede, "Shapiro Steps in a Superconducting Film with an
 Antidot Lattice." To be published in Phys. Rev. B. Laboratorium voor
 Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven,
 Celestijnenlaan 200 D, B-3001 Leuven, BELGIUM; telephone +32 16 32 7530;
 telefax +32 16 32 7983; e-mail <a href="mailto:lieve.vanlook@fys.kuleuven.ac.be">lieve.vanlook@fys.kuleuven.ac.be;</a>
 preprint also available at <a href="http://xxx.lanl.gov/abs/cond-mat/9907410">http://xxx.lanl.gov/abs/cond-mat/9907410.</a>
 74.25.Nf; 74.60.Ge; 85.25.Cp; 74.50.+r.
<p>
 J.-C. Villegier, B. Delaet, V. Larrey, P. Febvre, J. W. Tao, and G.
 Angenieux, "Extraction of Material Parameters in NbN Multilayer
 Technology for RSFQ Circuits." To be published in Physica C (in press).
 Service de Physique Statistique, Magnetisme et Supraconductivite-LCP,
 CEA-Grenoble, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, FRANCE;
 telephone +33 476 88 3587; telefax +33 476 88 5097; e-mail
 <a href="mailto:villegier@cea.fr">villegier@cea.fr.</a> Key words: Josephson circuits, RSFQ logic,
 superconductive multilayers, nitride films.
<p>
 W. Wong-Ng, M. Melamud, L. H. Bennett, and R. E. Watson, "Local
 Environments of Three Forms of Ba2YCu3O6+x." To be published in Physica
 C (in press). Materials Science and Engineering Laboratory, National
 Institute of Standards and Technology, United States Department of
 Commerce, Gaithersburg, MD 20899-0001; telephone (301) 975-5791; telefax
 (301) 975-5334; e-mail <a href="mailto:wongng@tiber.nist.gov">wongng@tiber.nist.gov.</a> Key words: Wigner-Seitz
 cells, bonding, superconductor.
<p>
 K. Yoshida, H. Sasakura, S. Tsukui, and Y. Mizokawa, "New Bi-Cuprate
 Thin Films of Bi2(La,Ca)2Can-1CunOz (n=3,4,5,6 and 7) Prepared by Laser
 Ablation Method." To be published in Physica C (in press). Department
 of Physics, Hamamatsu University School of Medicine, Handa-cho,
 Hamamatsu, Shizuoka 431-3192, JAPAN; telephone +81 53 435 2345; telefax
 +81 53 435 2315; e-mail <a href="mailto:kyoshida@hama-med.ac.jp">kyoshida@hama-med.ac.jp.</a> Key words: Bi-La-Ca-
 Cu-O system, Bi2(La,Ca)2Can-1CunOz (n=3,4,5,6 and 7), 2223, metastable
 phase, thin film, laser ablation. 74.72.Hs.
<p>
 Liyuan Zhang and Qiang Han, "Electronic Pairing and Variation in the
 Normal State of Metal." To be published in Int. J. Mod. Phys. B: Proc.
 of the Second Int. Conf. on New Theories, Discoveries and Applications
 of Superconductors and Related Materials (New3SC-2), Las Vegas, Nev.,
 May 31-June 4, 1999. Department of Physics, Peking University, Beijing
 100871, PEOPLE'S REPUBLIC OF CHINA; telephone +86 10 6275 2369; e-mail
 <a href="mailto:zhangly@mail.phy.pku.edu.cn">zhangly@mail.phy.pku.edu.cn.</a>
<p>
 Wei-Min Zhang, "Underlying Pairing States in Cuprate Superconductors."
 Department of Physics, National Cheng Kung University, Tainan, Taiwan
 701, REPUBLIC OF CHINA; e-mail <a href="mailto:wzhang@mail.ncku.edu.tw">wzhang@mail.ncku.edu.tw;</a> preprint also
 available at <a href="http://xxx.lanl.gov/abs/cond-mat/9907287">http://xxx.lanl.gov/abs/cond-mat/9907287.</a> 74.20.-z;
 74.20.Mn; 74.25.Ha; 71.10.-w.
<p>
 Yi Zhuo, Su-Mi Oh, Jae-Hyuk Choi, Mun-Seog Kim, Sung-Ik Lee, N. P.
 Kiryakov, M. S. Kuznetsov, and Sergey Lee, "Effects of Sr Substitution
 on Dimensionality and Superconducting Properties of
 Hg0.7Pb0.3Ba2Ca2Cu3Oy." To be published in Phys. Rev. B. National
 Creative Research Initiative Center for Superconductivity, Department of
 Physics, Pohang University of Science and Technology, Pohang, Kyungbuk
 790-784, SOUTH KOREA; telephone +82 562 279 5289; telefax +82 562 279
 5299; e-mail <a href="mailto:zhuoyi@postech.ac.kr">zhuoyi@postech.ac.kr</a> or <a href="mailto:yizhuo99@hotmail.com">yizhuo99@hotmail.com.</a> 74.25.Bt;
 74.25.Ha; 74.40.+k; 74.60.Ec.
<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>
 *Oct. 17 - 19, 1999: 12th International Symposium on Superconductivity
 (ISS'99), Hotel Metropolitan Morioka, Morioka, Japan. Forum for free
 exchange of information, to contribute to the advancement of super-
 conductivity and strengthen international cooperation. Symposium will
 consist of oral and poster sessions, highlighted by a few dozen invited
 talks on the latest topics related to superconductivity. Will cover the
 latest findings and related themes in the following research fields of
 superconductivity: physics and chemistry, bulks, wires and tapes,
 system applications , films and junctions, and electronics. Official
 language is English. For information, contact ISTEC, Eishin Kaihatsu
 Bldg. 6F, 34-3 Shimbashi 5-chome, Minato-ku, Tokyo 105-0004, Japan;
 telephone +81 3 3431 4002; telefax +81 3 3431 4044.
<p>
 *Nov. 1 - 5, 1999: 9th Workshop on rf Superconductivity, La Fonda
 Hotel, Downtown Santa Fe, New Mexico. Brings together over 200
 contributors from dozens of laboratories and industries around the
 world. Workshop will cover the status of, and advances in, rf
 superconductivity; field emission in niobium cavities; fabrication,
 cleaning, and surface preparation; rf power delivery; topical reviews
 related to materials used in superconducting cavity fabrication; and
 future applications of superconducting technology. Abstract deadline,
 September 15, 1999. For more information, contact Lorraine Stanford,
 Los Alamos National Laboratory, P.O. Box 1663, MS H845, Los Alamos, NM
 87545; telephone (505) 667-5051; telefax (505) 667-9409; e-mail <a href="mailto:rfsc99@">rfsc99@</a>
 lanl.gov; Web site <a href="http://mesa53.lanl.gov/rfsc99/">http://mesa53.lanl.gov/rfsc99/.</a>
<p>
 *Nov. 29 - Dec. 3, 1999: Materials Research Society Fall 1999 Meeting:
 Symposium Q -- Advances in Materials Problem Solving with the Electron
 Microscope, Boston, Mass. Topics: structural metallic alloys (e.g.,
 alloy development, phase transformations); structural and electronic
 ceramics, composites, and minerals; polymers, zeolites, catalysts, and
 fullerenes; microelectronic materials and electroluminescent materials;
 epitaxial and polycrystalline thin films and multilayers; and magnetic
 materials for permanent magnets and data storage. Contact Charles
 Allen, Argonne National Laboratory, Electron Microscopy Ctr.-HVEM-Tandem
 Facility, MSD 212/E211, 9700 South Cass Ave., Argonne, IL 60439;
 telephone (630) 252-4157; telefax (630) 252-4798 or -4298; e-mail
 <a href="mailto:allen@aaem.amc.anl.gov">allen@aaem.amc.anl.gov;</a> conference Web site
 <a href="http://www.mrs.org/meetings/fall99/">http://www.mrs.org/meetings/fall99/.</a>
<p>
 March 20 - 24, 2000: 2000 March Meeting, Minneapolis Convention Center,
 Minneapolis, Minn. Sessions on superconductivity will include the
 following topics: synthesis, growth, and processing (bulk and films);
 thermodynamic and transport properties; mechanical and structural
 properties; electronic structure and spectroscopic properties; flux
 pinning and flux dynamics; spin properties (NMR,NQR, etc.); tunnel
 junctions, devices, and Josephson arrays; quantum computing; and other
 focused sessions. Abstract deadline, December 3, 1999. (Complete
 abstract submission instructions can be found at
 <a href="http://www.aps.org/meet/meet-abstract.html">http://www.aps.org/meet/meet-abstract.html.)</a> For further general
 information, contact Donna Baudrau, Manager, APS Meetings Department,
 telephone (301) 209-3285, e-mail <a href="mailto:baudrau@aps.org">baudrau@aps.org;</a> more information on
 the March meeting is available at the Web site
 <a href="http://www.aps.org/meet/MAR00/">http://www.aps.org/meet/MAR00/.</a>
<p>
 *May 28 - June 2, 2000: International Conference on Transport Processes
 in Inorganic Materials: Fundamentals to Devices, Venice (Jesolo Beach),
 Italy. Objective is to discuss recent developments in microscopic
 mechanisms of transport in different inorganic materials; assess the
 role of transport in materials reactivity, synthesis, and processing;
 explore the transport mechanisms which affect materials properties and
 behavior under operating conditions; and exploit the role of transport
 processes in a number of advanced technologies of current or emerging
 interest. Papers are solicited in a several areas, including diffusion
 and transport in media of lower dimensionality, single-crystal growth,
 materials processing for HTS materials, and superconducting devices for
 high- and low-field applications. For information, contact CIMTEC-
 Transport Phenomena Conference, P.O. Box 174, I-48018 Faenza, Italy;
 telefax +39 0546 664138.
<p>
 June 21 - 23, 2000: 4th European Workshop on Low Temperature
 Electronics (WOLTE-4), European Space Research and Technology Centre
 (ESTEC), Noordwijk, The Netherlands. Organized by the European Space
 Agency (ESA) and co-sponsored by IEEE/EDS. Objective of the workshop is
 to provide an international forum for discussing recent research and
 development in the area of low-temperature electronics including
 semiconductors, low- and high-temperature superconductors, devices,
 circuits, and systems. Emphasis on the application of these for space
 instrumentation. Both oral and poster presentations. Intent to exhibit
 or to organize a short course should be indicated to the Conference
 Secretariat with a preliminary description of requirements by October
 15, 1999. Topics: device physics and fundamental aspects, fabrication
 technologies, device and circuit design, packaging and interconnections,
 front-end systems for cryogenic sensors, device simulation and modeling,
 cryogenic measurements and instrumentation, new materials and novel
 technologies, space-related applications, refrigeration, and interfacing
 for electronics. Abstract deadline, December 15, 1999. Contact ESTEC
 Conference Bureau, P.O. Box 299, 2200 AG Noordwijk, The Netherlands;
 telephone +31 71 5655005; telefax +31 71 5655658; e-mail
 <a href="mailto:confburo@estec.esa.nl">confburo@estec.esa.nl;</a> Web site
 <a href="http://www.estec.esa.nl/CONFANNOUN/wolte4/">http://www.estec.esa.nl/CONFANNOUN/wolte4/.</a>
<p>
 <hr>
<p>
 RESOURCES
<p>
 Information
<p>
 Proceedings: Physics and Materials Science of Vortex States, Flux
 Pinning and Dynamics -- Proceedings of the NATO Advanced Study
 Institute, Kusadasi, Turkey, July 26-August 8, 1998, edited by Ram
 Kossowsky, Shyamalendu Bose, Vladimir Pan, and Zafer Durusoy. NATO
 Science Series: Applied Sciences, Volume 356. Discussion by an
 assembly of expert physicists and materials scientists embracing the
 specific features of vortex-pin interactions, modes of different kinds
 of vortex motion under the action of Lorenz force, and mechanisms of
 dissipation. Implications for the development of new devices and
 components in electrical engineering, modern electronics, computer
 technology, and microwave communication. Publ. 1999; 788 pp.; price
 $357 (HB) or $117 (PB); ISBN 0-7923-5663-2 (HB) or ISBN 0-7923-5664-0
 (PB).
<p>
 Crystal Engineering: The Design and Application of Functional Solids --
 Proceedings of the NATO Advanced Study Institute, held in Digby, Nova
 Scotia, Canada, September 9-20, 1996, edited by Kenneth Richard Seddon
 and Michael Zaworotko. NATO Science Series C: Mathematical and
 Physical Sciences, Volume 539. Crystal engineering is a rapidly
 emerging, cross-disciplinary field that seeks to develop protocols for
 predicting and controlling the structure and thus the functional
 properties of solids. The emergence of the field can be attributed to a
 corresponding rise in the importance of supramolecular chemistry and its
 relevance to areas as diverse as polymorphism in pharmaceuticals,
 nonlinear optics and high-Tc superconductors. Book consists of chapters
 discussing bonding theory, computational chemistry, applied
 spectroscopy, structural methods, synthesis strategies, and applications
 of custom-designed solids. Readership: synthetic chemists, solid-state
 chemists, physicists, pharmaceutical researchers interested in
 polymorphism and the bulk properties of solids; and theoreticians
 interested in the prediction of bulk properties. The book can serve
 both as an introduction to the field and an advanced research reference.
 Publ. 1999; 512 pp.; price $227 (HB); ISBN 0-7923-5905-4.
<p>
 High-Temperature Superconductors and Novel Inorganic Materials:
 Proceedings of the NATO Advanced Research Workshop on High-Temperature
 Superconductors and Novel Inorganic Materials Engineering MSU-HTSC V,
 Moscow, Russia, March 24-29, 1998, edited by G. Van Tendeloo, E. V.
 Antipov, and S. N. Putilin. NATO Science Partnership Series: 3: High
 Technology, Volume 62. Research into high-Tc materials demands the co-
 operation of physicists, chemists and materials scientists to discover
 the best solutions to the most important challenges presented by the
 field. In this fifth annual Workshop, the topic is extended beyond
 high-Tc superconductivity to include other advanced oxide materials,
 mainly colossal magnetoresistance materials, which are closely related
 to the ceramic superconductors. This book covers the synthesis,
 characterization (both structural and physical) and engineering of this
 class of materials. Publ. 1998; 318 pp.; price $147 (HB), $72 (PB);
 ISBN 0-7923-5345-5 (HB), ISBN 0-7923-5346-3 (PB).
<p>
 For information, contact Kluwer Academic Publishers, Customer Service
 Department, P.O. Box 358, Accord Station, Hingham, MA 02018-0358;
 telephone (781) 871-6600; telefax (781) 681-9045; e-mail
 <a href="mailto:kluwer@wkap.com">kluwer@wkap.com.</a> Outside North and South America, contact Kluwer
 Academic Publishers, Customer Service Department, P.O. Box 989, 3300 AZ
 Dordrecht, The Netherlands; telephone +31 78 639 23 92; telefax +31 78
 639 22 54; e-mail <a href="mailto:services@wkap.nl">services@wkap.nl.</a>
<p>
 <hr>
<p>
 FYI
 (High-Tc Update takes no responsibility for want ads listed in this
 section.)
<p>
 Position Available: Well-established HTS group with growing commercial
 success has one or more positions available for material
 scientists/chemists and physicists/engineers. Aventis Research and
 Technologies was formed from the former Hoechst Corporate Research
 group, and combines 12 years of HTS knowledge with a strong commercial
 base focused at end user applications. Positions seek one or more
 scientists to join the international team at its newly consolidated
 operations site in Cologne, Germany. Knowledge of the chemistry and
 properties of bulk BSCCO and/or YBCO at Ph.D. level would be an
 advantage. Positions are available for work on both materials
 development and electrical power applications. Interested applicants
 should send a CV and the names of three referees to Dr. Joachim Bock,
 Aventis Research & Technologies GmbH & Co. KG, Chemiepark Knapsack, D-
 50351 Huerth, Germany; telephone +49 2233 48 6658; cell phone +49 172
 265 1465; telefax +49 2233 48 6847; e-mail <a href="mailto:bock@msmiuk.hoechst.com">bock@msmiuk.hoechst.com.</a>
<p>
 <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:
<p>
 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>
 Project Director/Editor: Sreeparna Mitra
 Science Editor: John R. Clem
 High-Tc Update, Vol. 13, #17, September 1, 1999.
 <hr>