Advances in Superconductivity VII: Proceedings of the 7th International Symposium on Superconductivity (ISS’94), November 8–11, 1994, Kitakyushu. Volume 1 & 2

The field of high-temperature superconductivity has encouraged an inter­ disciplinary approach to research. It has required significant cooperation and collaboration among researchers, each of whom has brought to it a rich variety of experience from many other fields. Recently, great improvements have been made in the quality of research. The subject has matured and been launched into the next stage through the resonance between science and technology. The current progress of materials processing and engineering in this field is analogous to that previously seen in the development of semiconductors. These include the appearance of materials taking the place of YBa2Cu307 owing to their improved properties (higher critical temperatures and stronger flux pin­ ning) in which rare earth ions with large radii (La, Nd, Sm) substitute for Y; the development of technology enabling growth control on the nanometer scale; and precise and reproducible measurements that can be used as rigorous tests of theoretical models, which in turn are expected to lead to the develop­ ment of new devices. For further progress in high-T research, academics and c technologists must pool their knowledge and experience. I hope that this volume will promote that goal by providing the reader with the latest results of high-temperature superconductor research and will stimulate further discussion and collaboration. Front Matter....Pages III-XXII Front Matter....Pages 1-1 Epitaxial High-T c Films — Impact on Science and Applications....Pages 3-8 Physical Properties of the New Borocarbide Superconductors....Pages 9-14 Strong Flux Pinning In Melt-Grown RE123 (RE: Sm, Eu, Gd) Superconductors....Pages 15-18 Investigation of the Josephson Effect in Y(Yb)Ba 2 Cu 3 O 7−y Single Crystal Break Junctions....Pages 19-22 Progress and Recent Trend of SMES Research....Pages 23-28 Front Matter....Pages 29-29 Determining the Symmetry of the Superconducting Pairing State from Phase Coherence in Josephson Junctions and dc SQUIDs....Pages 33-38 A Search for Nodes in the Wavefunction of Superconducting Y 1 Ba 2 Cu 3 O 7−δ Thin Films....Pages 39-43 Symmetry of Pair Potential Observed by Tunneling Spectroscopy....Pages 45-48 Low temperature STM/STS measurements on c-axis oriented Y 1 Ba 2 Cu 4 O 8 superconductive films....Pages 49-52 Gap Value Determinations on the Tunneling Spectrum....Pages 53-56 LT-STM/STS Study on Bi 2 Sr 2 CaCu 2 O y ....Pages 57-60 Observation of Inhomogeneous Spatial Conductivity on YBCO Single Crystal by LT-UHV-STM....Pages 61-64 Manifestation of a Clear Gap Structure and Quantum Size Effects From Point-Contact and Tunneling Spectroscopy of YBa 2 Cu 3 O 7−x and YbBa 2 Cu 3 O 7−x Single Crystals....Pages 65-68 Scanning Tunneling Microscopy of Cleaved Surfaces of Bi 2 Sr 2 CuO 6 +δ ....Pages 69-72 A Thermodynamic Investigation of the Normal State Spectrum of YBa 2 Cu 3 O 6+x ....Pages 75-80 Anomalous Transport Properties in the Tetragonal Superconductor CaLaBaCu 3 O y ....Pages 81-84 Annealing Effect on the c-Axis Negative Magnetoresistance in Bi-2212 Single Crystals....Pages 85-88 Anisotropic Transport Properties of YBa 2 Cu 3 O 7−δ Single-Crystal....Pages 89-92 Nonlinear Transport in insulating YBa 2 Cu 3 O y ....Pages 93-96 Correlation Between Tc and Hole Concentration of Bi2212 Phase ~ Effect of Annealing in Absence of Oxygen ~....Pages 97-100 Front Matter....Pages 29-29 Thermoelectric Power of TCNQ-Treated (Bi,Pb)-2223 Cuprates....Pages 101-104 Hall Effect Measurements for YBa 2 Cu 3 O x Thin Films in Pulsed High Magnetic Fields up to 40T....Pages 105-108 Hall Effects in Bi 2 Sr 2 CaCu 2−x Ni x O 8+δ Single Crystals in Normal and Mixed States....Pages 109-112 Scaling of the Hall Resistance in the Mixed State of Indium Films....Pages 113-116 Distinct Insulating Phase at Low Temperature in Thin Superconducting Films....Pages 117-120 Thickness Dependence of the I–V Characteristics in Indium Films....Pages 121-124 Superconducting Properties in Bi-2201 Single Crystals....Pages 125-128 Low Temperature Annealing Effect on Superconducting Properties of YBCO Crystals Grown by SRL-CP Method....Pages 129-132 Material Properties of YBa2Cu3Ox Single Crystals Grown by the SRL-CP Method; Pinnig and Coupling Between CuO2-Plan....Pages 133-136 Tetragonal Tweed Phase Superconducting YBCO Single Crystals....Pages 137-140 Effect of Light Irradiation on the Crystal Structure and Conductivity of Reduced YBa 2 Cu 3 O 7−y ....Pages 141-144 57 Fe Mössbauer Spectroscopy for Bi-System Superconductors....Pages 147-150 NQR study in YBa 2 Cu 4 O 8 under pressure....Pages 151-154 NMR Study of the Magnetism and Superconductivity in Cu 1+x Co 2−x S 4 ....Pages 155-158 Is a Pseudogap Responsible for the Semiconducting-Like c -Axis Conductivity In Underdoped YBa 2 Cu 3 O 7−δ ?....Pages 161-164 Indirect Excitons in Three-Dimensional Charge-Density-Wave System of BaBiO 3 ....Pages 165-168 Temperature Dependence of Optical Spectra for the CDW Gap and Optical Phonons in BaBiO 3 ....Pages 169-172 Low-Frequency Raman Spectra of (BiPb) 2 Sr 2 CaCu 2 O 8 ....Pages 173-176 Effects of Ni Substitution on the Superconducting and Raman Spectra in YBa 2 Cu 4 O 8 ....Pages 177-180 Spectral Dependence of Photoinduced Hole Doping Effects in Oxygen-Deficient YBa 2 Cu 3 O y ....Pages 181-184 Front Matter....Pages 29-29 Electromagnetic Generation and Detection of Acoustic Waves by High- T c Superconductors under Magnetic Field....Pages 185-187 Microwave Penetration Depth Measurements as a Probe of the Superconducting State of YBCO....Pages 191-196 Superconducting-State Parameters and Anisotropy of HgBa 2 Ca n−1 Cu n O y ....Pages 197-200 Frequency Dependence and Anisotropy of ac Field Screening in the Mixed State of Bi 2 Sr 2 CaCu 2 O 8 ....Pages 201-204 Vortex Phase Diagram near Tc via DC and AC Magnetization of BSCCO-2212 Crystal....Pages 205-208 Anomalous Peak Effect in the Tl 2 Ba 2 CaCu 2 O 8+y Single-Crystal....Pages 209-212 Anomalous Temperature Dependence of dc Magnetization in Superconducting High- T c Thin Films....Pages 213-216 Unusual Lattice Hardening below T c in La 2−x Sr x CuO 4 ....Pages 219-224 Dependence of T c on Uniaxial Stress for Single Crystal of Bi 2 Sr 2 CaCu 2 O x ....Pages 225-228 Neutron Scattering and Microstructural Studies of the Crystalline Perfection of SRL-CP Single Crystals of Y 1 Ba 2 Cu 3 O 7−δ ....Pages 229-232 A Note on High T c Layered Superconductors Illustrated by Phase Coherence Competition with Charging Energies....Pages 233-236 Structural Study on BaCuO 2 Single-Crystal Thin Films by X-ray Weissenberg Method....Pages 237-240 Effect of Tb Substitution on the Superconductivity of La 2−x Ba x CuO 4 ....Pages 241-244 Front Matter....Pages 245-245 A New Homologous Series of Compounds: Cu-12(n−1)n :P....Pages 249-254 New Low Anisotropic High-Tc Superconductors (Cu, Ag)Ba 2 Ca n−1 Cu n O 2n+4−y ....Pages 255-260 Synthesis of CuBa 2 Ca 3 Cu 4 O 12−δ with Low Anisotropy....Pages 261-264 New Homologous Series of Pb-based Cuprate Superconductors....Pages 265-268 Attempts at Preparation of CuBa 2 Ca (n−1) Cu n O y Superconductors by Sol-Gel Method....Pages 269-272 Synthesis and Chemical Characterization of Pb 2 Ba 2 EuCu 3 O z Samples....Pages 273-276 Preparation and Properties of a New Layered Structural Cuprate, Gd 2 CaBa 2 Ti 2 Cu 2 O 12 ....Pages 277-280 Front Matter....Pages 245-245 High-pressure syntheses of Ga/Al-based cuprate superconductors....Pages 281-284 Chemical Stabilization and Irreversible Magnetic Behavior of HgM 2 Ca n−1 Cu n O y with M=Sr(Ba) and n=1 to 3....Pages 287-290 New family of mercury- and thallium-based superconductors, Hg 1−x Tl x Ba 2 (Ca 0.86 Sr 0.14 ) 2 Cu 3 O 8+δ ....Pages 291-294 Preparation and Properties of (Hg 1−x Bi x )Ba 2 Ca 2 Cu 3 O 8+δ ....Pages 295-298 Comparison of Carrier Doping Levels of Pb-Free and Pb-Doped (Hg,Pb)Ba 2 Ca 2 Cu 3 O 8+δ Superconductors....Pages 299-302 Effects of Bismuth Substitution on Magnetization Properties of Hg 1−x Bi x Ba 2 Ca 2 Cu 3 O y Superconductors....Pages 303-306 Preparation of Hg-Based Superconductors with Various Oxygen Content....Pages 307-310 Low-temperature Crystal Growth of TI-based Superconductor....Pages 313-316 Single Crystal Growth of Tl 2 Ba 2 CaCu 2 O 8 and Tl 2 Ba 2 Ca 2 Cu 3 O 10 and Low Temperature X-ray Single Crystal Experiment of Tl 2 Ba 2 Ca 2 Cu 3 O 10 ....Pages 317-320 In-situ Observation of Crystallization from a Glassy State in the Bi-Sr-Ca-Cu-O System....Pages 321-324 Single Crystal X-ray Diffraction Study of Cu-Based Superconductors....Pages 325-328 Thermally Induced Phase Transformation and Superconductivity in Oxygen Reduced YBa 2 Cu 3 O x ....Pages 329-332 Fabrication of YBa 2 Cu 3 O 7−δ Film by Laser MOCVD using Ba(hfa) 2 ·tetraglyme....Pages 333-336 Preparation of Superconducting Ba-Ca-Cu-O Thin Films by RF Thermal Plasma Deposition Method....Pages 337-340 Microstructure of Melt-Processed Nd-Ba-Cu-O Superconductors....Pages 341-344 SmBaCuO Superconductors Melt-Processed in Low Oxygen Partial Pressures....Pages 345-347 Stoichiometry, Structure, and Properties of La 2 NiO 4+δ and La 2-x Sr x NiO 4±δ ....Pages 351-356 Phase Equilibria in the Sr-Ca-Cu-O system....Pages 357-360 Modelling of Thermodynamics and Phase Equilibria in Selected Subsystems of the Bi-Sr-Ca-Cu-O System....Pages 361-364 Phase Equilibria in Parts of the System Bi-Sr-Ca-Oxide at 820 and 900°C in Air....Pages 365-368 Front Matter....Pages 245-245 A New High Pressure form of BaCuO 2+x ....Pages 369-372 Thermodynamics and Phase Diagram of the Ag-Cu-O System....Pages 373-376 Superconducting Properties of the La 1+x Ba 2−x Cu 3 O y System....Pages 377-380 O 2 -HIP preparation and characterization of PrBa 2 Cu 4 O 8 ....Pages 381-384 Observation of Low Temperature Oxygen Diffusion in Deuterium-Doped YBa 2 Cu 3 O 6 Single Crystal by SIMS....Pages 385-388 Origin of Modulated Structure for Bi2212 Superconductor....Pages 389-392 Anisotropic Electrical Resistivity of La 2−x Ca x CuO 4 Single Crystals....Pages 393-396 Superconductivity in Carrier-Doped BaCuO x Thin Films....Pages 397-400 Synthesis and Electrical Property of MgTi 2-x V x O 4 ....Pages 401-404 Investigation of Synthesizing Process for Single Phase Y—Pd—B—C....Pages 405-408 Front Matter....Pages 409-409 Observation of the Flux-Line Lattice by Neutron Diffraction and Muon-Spin Rotation....Pages 413-418 Magneto-Optical Observation of Flux Penetration Along Twin Boundaries in YBa 2 Cu 3 O 7 ....Pages 419-422 Critical Current Density Estimation of YBCO by Trapped Field Measurement Using a Hall Probe....Pages 423-426 Magneto-Optical and HREM Studies of Flux Pinning at Grain Boundaries in the bc Plane of Bi2212 Crystal....Pages 427-430 Observation of vortices in Bi 2 Sr 2 Ca 1 Cu 2 O y single crystal....Pages 431-434 Flux Properties in YBa 2 Cu 3 O 7−δ and Inhomogeneous ESR Broadening....Pages 435-438 Trapped Flux Density Distribution on the Surface of Oxide Superconducting Plates....Pages 439-442 Effect of Light Irradiation on Flux Flow in Oxide Superconductor....Pages 443-446 Flux Pinning Property in Superconducting Bi-2223 Tape Wires....Pages 449-454 Effects of Static Disorder on Vortex Phases and Dynamics of Type-II Superconductors — A Scaling Approach....Pages 455-460 Front Matter....Pages 409-409 Enhanced Critical Current Density in the Tl-Base Oxides with Fluorine Addition....Pages 461-464 Pinning Force Density in Strongly Pinned Superconductors....Pages 465-468 Scaling Law of Pinning Force Density in Bi-2223 Superconducting Tape Wires....Pages 469-472 Transport Anisotropy of Resistivity and Critical Current Density in Sputtered Y 1 Ba 2 Cu 3 O 7−y Films....Pages 473-476 Effect of 18 MeV Fe 8+ Ion Irradiation on Microstructue of Bi 2 Sr 2 CaCu 2 O x Single Crystal....Pages 477-480 Critical Current Densities of Thin YBaCuO Films in Parallel Magnetic Fields....Pages 481-484 Computational Analysis of Optimal Size of a Cylindrical Insulating Inclusion Acting as a Pinning Center....Pages 485-488 Calculations of Electronic Structure of Candidates for Magnetic Flux Pinning Centers in Oxide Superconductors....Pages 489-492 Flux Creep and Pinning Strength in Superconducting Pb-Bi Alloys with Different Pinning Strength....Pages 493-496 Dependence of Irreversibility Temperature on Thickness of Superconducting Films....Pages 497-500 Critical Current Property and Irreversibility Line in Superconducting Hg-1212....Pages 501-504 Irreversibility Properties in Superconducting Pb-Bi Alloys....Pages 505-508 Synthesis and Physical Properties of Ca-doped YBa 2 Cu 3 O y Thin Films....Pages 509-512 The Effect of B and P Ion Implantation on Superconducting Magnetic Shielding in NbTi Sheets....Pages 513-516 Irreversibility Magnetic Fields and Vortex-Glass-like Behavior in Tl 1 Ba 2 Ca 2 Cu 3 O x and Tl 2 Ba 2 Ca 2 Cu 3 O x Thin Films....Pages 517-520 Complex susceptibility of infinite-layer superconductor (Sr 0.7 Ca 0.3 ) 0.95 CuO 2−x ....Pages 523-526 Irreversibility line of YBa 2 Cu 3 O 7 single crystal with optimum oxygen stoichiometry....Pages 527-530 TEM Zone Axis Critical Voltage in YBCO and Microanalysis of Oxygen Concentration....Pages 531-534 AC Magnetic Susceptibility of Bi 2 Sr 2 CaCu 2 O 8 Single Crystal....Pages 535-538 Magnetic Torque in La 2−x Sr x CuO 4−δ Single Crystals with Various Carrier Doping States....Pages 539-542 Front Matter....Pages 409-409 Transport Properties in a -Axis Oriented YBa 2 Cu 3 O x Thin Films....Pages 543-546 Persistency of Superconducting Current in YBCO(123) and BSCCO(2212)....Pages 547-550 Flux Creep of Proximity-induced Magnetization in NbTi Multifilamentary Wires with Cu-Mn Matrix....Pages 551-554 Critical Current Distribution and Flux Creep Properties in Y 1 Ba 2 Cu 3 O 7-δ Superconducting Thin Films....Pages 555-558 Minor Magnetization and Flux Creep Characteristics in YBaCuO Superconductors with Distributed Pinning Forces....Pages 559-562 Anomalous Non-Linear Effect of the c-Axis I–V Characteristics in Single Crystalline Bi 2 Sr 2 CaCu 2 O 8+δ under Magnetic Fields....Pages 563-566 Back Matter....Pages I-1-I-13 The Seventh International Symposium on Superconductivity brought together researchers at the forefront of all fields such as physics, chemistry, materials, production engineering, and electronic and electrical engineering, once again underlining the interdisciplinary nature of high-temperature superconductivity. Speakers shared their latest findings in the fundamental physics and chemistry; superconductors in the form of individual devices and systems. This comprehensive volume will prove indispensable for all who are involved in high-temperature superconductivity research.