Advances in Superconductivity IX: Proceedings of the 9th International Symposium on Superconductivity (ISS '96), October 21-24, 1996, Sapporo Volume 2

ISBN-13: 9784431684756 / Angielski / Miękka / 2014 / 847 str.

Sadao Nakajima; Masato Murakami

Opis

C axis Current I ~ . The (11 0) thick homoepitaxial film of 320 nm -------~ ~-=-=--==---==--==--==--- shows a very good surface flatness, which --------** sJ;1 0] suggests the unique (110) atomic plane helps 2- A [1 1 OJ dimensional epitaxial growth of YBCO films, and shows excellent high Tc. The resultant 1. 0 surface morphology of YBCO is quite different Q ,. -- R(270)=1. 60 m 0 from the (110) heteroepitaxial films of similar 0 0. 0 " thickness [11). In the case of heteroepitaxy ~ . ,,_. 1. 0 irrespective of c-axis [ 12] or a-axis oriented ~ ~. . ,. R(270)=3. 71 m 0 films [5), only thin films show flat surfaces, g 0. 0 . . Tc=92. 3K "' which, however, give usually a degraded Tc due -~ 1. 0 v v I - to lattice mismatching. In conclusion, we have ::1. ,...R(270)=31. 9 mO succeeded to grow high-quality (11 0) YBCO ~ YBCO film . . Tc=90. 7 K 0. 0 *;:: YBCO(IIO) 1 0 *d*--~ YBCO thinfilms on (11 0) YBCO single crystal substrate ~Xtt=u 1. 0 substra substrates with very flat surfaces and high Tc's. :GBP R(270)=40. 1 m 0 0. 0 LLLLL. J...LL~. t-J' L-Tc=9LWO. L-! L-K LLLLL...L. . I...l...L. L. L. J...L. L. l...J 50 100 150 200 250 300 0 ACKNOWLEDGMENTS Temperature (K) One of the authors (T. U. ) would like to thank Fig.

Spis treści

of Volume 2.- 5 Wires, Tapes, and Bulk: 5.1 YBCO Type Superconductors.- Liquid Phase Epitaxy of YBCO on Single-Crystalline Oxide Fibers for Power Application.- Effect of Internal Uranium Fission on the Critical Current Density of Y-Ba-Cu-O Melt-Textured Superconductors.- Melt Processing of LRE-Ba-Cu-O Superconductors.- Development of Biaxially Textured Buffer Layers on Rolled-Ni Substrates for High Current YBa2Cu3O7-y Coated Conductors.- Fabrication of NdBa2Cu3Ox Superconducting Thick Films by a Horizontal-Flux-Bridgman Method.- Supression of Grooves of YBa2Cu3O7-x Films on Rolled Silver Substrates by Deposition of Amorphous Y-Ba-Cu-O Films.- Fabrication of YBCO Superconducting Tape by Continuous MOCVD Technique.- Fabrication of High Critical Current Density Superconducting Tapes by Epitaxial Deposition of YBCO Thick Films on Biaxially Textured Metal Substrates.- Preparation of Twin-Free YBa2Cu3Ox Crystal Without Twin Formation.- Anomalous Peak Effect in M-H Loop and Phase Separation on Nd1+xBa2-xCu3O7-d Crystal.- Dispersion Of Y2O3 with Y123 Phase Under Microgravity Condition.- The Effect of Silver Addition on the Melt Growth of YBa2Cu3O6+x.- Second Phase Effect on Mechanical Properties of OCMG-Processed Nd-Ba-Cu-O Superconductors.- Effect of Processing Conditions on the Melt Processed La123 Superconductor.- Melt Growth of RE123 at Low Oxygen Partial Pressures.- The Critical Current Density in Nd-Ba-Cu-O Bulk Superconductors with Different Amounts of Nd422 Second Phase.- Unidirectional Partial Melting and Solidification Processing of Sm123 Superconductor.- The Effect of Platinum Doping on the Spatial Distribution of Y2BaCuO5 Inclusions in Large Grain Melt Processed YBa2Cu3O7-d.- Anisotropy in Knoop Hardness of MPMG-Processed YBCO Bulk Superconductor.- Low Temperature Pulsed Field Magnetization of Melt-Processed Y-Ba-Cu-O Superconducting Bulk Magnet.- Pinning Effect of Misfit Dislocations in YBa2Cu3O7-v Superconducting Film by Liquid Phase Epitaxy.- Growth Structure of Biaxially Aligned Buffer Layers by Ion Beam Assisted Deposition.- In-Plane Aligned YBCO Thin Film Tape Fabricated by Pulsed Laser Deposition.- Long and High Jc YBCO Tapes Using Continuously Deposited YSZ Buffer Layers by Ibad Method.- Fabrication of the Faceted SrTiO3 Fibers for Superconducting Wires.- Growth Rate and Superconductivity of Y(Sm)BCO Single Crystals.- Subgrains, Thermal Stresses and Microcracking in OCMG NdBaCuO.- Effects of Oxygenation Time on the Levitation Force of Melt-Textured YBa2Cu3O6+x Containing Y2BaCuO5 Inclusions.- Shape Design for the Maximum Trapped Field on YBCO Superconducting Magnets.- Melt Processing for Sm 123 Bulk Superconductors.- Growth Rate and Microstructure in Top-Seeded Melt Grown Y-Ba-Cu-O Bulk Superconductors.- Coarsening of Nd4Ba2Cu2O10 Particles.- Superconducting and Magnetic Properties of Quasi-Ternary Rare-Earth’s RE-Ba-Cu-O (123) Composites Prepared by the Oxygen-Controlled-Melt-Growth (OCMG) Process.- RE211 (Y2BaCuO5, Sm2BaCuO5, Nd4Ba2Cu2O10) Refinement in the Melt-Textured Re-Ba-Cu-O Superconductors.- Flux Motion During Pulsed Field Magnetization in Melt-Processed Y-Ba-Cu-O Superconducting Bulk Magnet.- Effect of p(CO2) on Growth of YBCO Phase in Dipping-Pyrolysis Process.- Superconducting Characteristics of Nd1+xBa2-xCu3Oy Thick Film by Liquid Phase Epitaxy.- Preparation of Intermediate Buffer Layer Between YBCO Film and YSZ Substrate.- Fabrication of Round Shape YBa2Cu3O7-x Single Crystal by Automatic Crystal Pulling.- 5.2 BSCCO, TBCCO, and Other Type Superconductors.- Grain Boundary Networks and Percolative Current Flow in Polycrystalline, HTS Conductors.- Development of Ag-Sheathed Bi2223 Superconducting Wires and Their Applications.- Progress of and Prospects for Bismuth- and Thallium-Based HTS Conductors.- ac Losses in Bi2223 Parallel Conductors for Superconducting Power Machines and Devices Operating at LN2 Temperature.- Improvement of the Microstructure and Homogeneity of Long Ag Sheathed Multifilamentary Bi(2223) Tapes.- Scaling and Anisotropy of Critical Currents in BSCCO-2223 Tapes with High Filling Factor.- Sausaging Mechanism and Effect on Critical Current Density in Bi2223/Ag Superconducting Tape.- Magnetic Properties of Ag-Cu Alloy Sheathed (Bi,Pb)2Sr2Ca2Cu3Oy Tapes.- Texture and Formation of (Bi,Pb)-2223 Phase in Ag, MgO/Oxide Interface Layers.- Formation of Bi2223 Phase in PIT-Processed Tapes.- Evaluation of the Multifilamentary Bi-2223 Ag Sheathed Tapes.- Fabrication and Test of Superconducting Magnets Made from Multifilament Bi-2223/Ag Tapes.- Characterization of Ag-Sheathed Bi2223 Tapes by Scanning Hall Probe Measurement.- Fabrication and Characterization of Ag-Mg Sheathed Bi2Sr2CaCu2Oy Multilayer Superconducting Tapes and Coils.- Fabrication of Long Tl-1223 Superconducting Tapes by the Spray Pyrolysis Method.- Effect of F-Doping in Solution-Spun HgxBa2Ca2Cu3Re0.2O Filament.- Fabrication of High Jc Bi-2223 Sintered Bulk.- Preparation of Bi2223 Bulk Current Leads by Hot Forging.- Preparation and Properties of Long Lengths of Ag-Sheathed Bi(2223) Tapes.- Fabrication of Conductor Using Bi-Based Multilayered Wires.- The Effect of Silver Diffusion Process for c-Axis Aligned Bi-2223.- Fabrication and Properties of Ag-Mg-Ni Alloy/Ag Sheathed Multifilamentary (Bi,Pb)2Sr2Ca2Cu3Ox Tapes.- Consideration of Jc Limiting Factors in Bi-2223 Ag-Sheathed Tapes.- Influence of Fabrications to the Properties of Ag-Sheathed Bi-2223 Tapes.- Fabrication and Magnetic Shielding Properties of Screen-Printed Ag-Bi2223 Tapes.- Preparation of Bi2Sr2CaCu2Ox/Ag Tapes by Isothermal Partial Melting Method.- Characterization of BSCCO-2212 Superconducting Tapes.- Preparation and Characterization of Textured Silver Tape as Substrates for Biaxially-Aligned Tl-1223 Film.- Growth of Bi2Sr2CaCu2Oy Single Crystals in the Atmospheres of Oxygen.- Connecting Bulks of Bi System by the Laser Irradiation.- Mechanical and Superconducting Properties in Bi-2223 Bulks for Current Lead.- Influence of the Frequency on the Electrical and Magnetic Properties of Rod-Shaped Y-Ba-Cu-O Superconductor Measured by the SRPM Method.- 5.3 Applications.- Unidirectionally Grown YBCO Rod for Current Lead.- Persistent-Current-Mode Operation of Superconductively Jointed Bi-2212 Solenoidal Coil.- High Ramp Rate Excitation Characteristics of a BSCCO-2223 Silver Sheathed Tape Coil Coupled to a Cryocooler.- Frequency Dependence of Shielding Current in Cylindrical Bulk Superconductors.- Modeling of Electromagnetic Phenomena and Evaluation of ac Losses in Multi-Filamentary BSCCO/Ag Superconductor.- Decrease in Quench Current Level of Multiply-Twisted ac Superconducting Cable Due to Local Longitudinal Magnetic Field.- R&D on HTS Wires in the Super-GM Project.- Development of Bi-2212/Ag Superconducting Insert Magnets for High Magnetic Field Generation.- Improvements in Coil Performance of DIP-Coated Bi-2212 Tapes.- An Electrical Model for ac Losses in an Ag Sheathed Bi(2223) Tape.- ac Loss Properties of Ag-Sheathed Bi2223 Multifilamentary Twisted Tapes Under Self-Fields.- Evaluation of ac Loss in Multi-Layer High-Tc Cable Conductor Based on Current-Voltage Characteristics.- Superconducting Multistrand Cables Stability: Review of Problems and Solutions.- 6 Thin Films: 6.1 Epitaxial Growth and Preparation Technologies.- La2-xSrxCuO4 Thin Films Grown by Reactive Coevaporation.- YBCO Deposition on Large Substrates up to 9? in Diameter.- Evaluation of a-Axis Oriented YBa2Cu3Oy Thin Films.- Preparation and Surface Morphology of YBa2Cu3O7-y Films by MOCVD Block by Block Deposition Using Liquid Sources.- Preparation of YBa2Cu3O7-d Thin Film by Hot-Wall Type MOCVD Using Liquid MO-Sources.- Preparation of YBa2Cu3O7-y Films by MOCVD Using Liquid State Sources Without Fluorine.- MOCVD Using New b-Diketonates for YBa2Cu3Ox and Zn Doped YBa2Cu3Ox Thin Films.- Preparation of c-Axis Oriented YBa2Cu3O7-x Thin Films Using Block-by-Block Sequence.- Preparation of Nd-Ba-Cu-O Thin Films by Reactive Coevaporation.- a-Axis Oriented YBa2Cu3O7-d Thin Films by MBE Technique.- Fabrication and Properties of Nd1+xBa2-xCu3O7-d Films Synthesized by rf Flash Plasma Evaporation.- Epitaxial Growth of GdBa2Cu3O7-d Thin-Films by Spin-Coating Method.- Preparation of In-Plane Aligned Yb123 Films by Metalorganic Deposition Processing.- Low Temperature Fabrication of Bi-2201 Thin Films by Oxygen-Plasma Assisted IBS.- Buffer Layers for Oxide Superconducting Thin Films Prepared by MOCVD.- Preparation of HgBa2Ca2Cu3O8+d Films Using Various Precursor Films on LaA103.- 6.2 Growth Mechanism and Characterization.- Microstructure of YBa2Cu3O7-y Films on NdGaO3(110) Substrate Prepared by Liquid Phase Epitaxy.- Surface Characterisation of YBCO Using Glancing Incidence-Exit X-Ray Diffuse Scattering.- (110) YBCO Homo-Epitaxy on (110) YBCO Single Crystals.- Crystallographic and Anisotropic Transport Properties in Untwined Bi2Sr2CaCu2Oy Thin Films.- MOCVD Homoepitaxial Growth on (100) and (001)-Oriented YBa2Cu3Ox Single Crystal Substrates.- The Effect of Moisture on the Surface Properties of c-Axis Oriented Nd1Ba2Cu3Oy Thin Films Studied by Scanning Probe Microscopes.- Structural and Electrical Properties of Liquid Phase Epitaxially Grown Y1Ba2Cu3Ox Films.- Channeling Analysis of YBa2Cu3O7-x Single Crystals at High Temperatures.- Oxygen Diffusion in c-Axis Oriented YBa2Cu3Oy Thin Films Observed by Secondary Ion Mass Spectrometry.- Effects of Bias Voltage and High Pressure on BSCCO Superconducting Films.- Microwave Properties of Bi2212 Thin Films Grown on MgO Single Crystals.- Fabrication of CeO2 Thin Films on YBa2Cu3O7 by MOCVD.- 7 Device Applications: 7.1 Josephson Junctions.- Implications of a $$\textup_{\textup^-\textup^}$$ Symmetry Component of the Superconducting Order Parameter on High-Tc Josephson Devices.- YBaCuO Trilayer Junctions with PrBaCuO Barrier.- High-Tc SNS Edge Junctions for Digital Circuit Applications.- Switching Time Criteria for High-Tc Josephson Gates with RSJ-Models.- Fabrication of Intrinsic Josephson Junction Stacks on Bi2Sr2CaCu2O8 Epitaxial Thin Films.- Investigations on Intrinsic Stacked Josephson Junctions of Tl2Ba2CaCu2Ox Thin Films.- Fabrication and Charcterization of Intrinsic Josephson Junctions for (Bi,Pb)SrCaCuO Thin Films.- Current-Voltage Characteristics of Intrinsic Josephson Junctions Fablicated on Bi-Sr-Ca-Cu-O Single Crystals.- c-Axis Tunneling in Multilayers NdBa2Cu3O7-d Junctions with PrBa2Cu3O7-d Barriers.- SIS Structure of Ba1-xKxBiO3 Fabricated by an Electrochemical Method.- Properties of the Edge Junctions Using PBCO-Based Materials as the Barrier Layers.- Microstructures and Reproducibility for Several High-Tc Josephson Junctions.- SiO2 Passivation Film Effects on High-Tc Josephson Junctions.- Optimization of Bicrystal Josephson Junctions for Small-Scale Circuits.- High Frequency Properties of YBCO Josephson Junctions on Si Substrates Fabricated by Focused Electron Beam Irradiation.- Enhancement of rf-Induced Current Steps for a Current-Driven Josephson Junction.- 7.2 Squid.- Detection of Moving Fine Particles by High Tc Squid.- Fabrication of Basic SFQ Logic Circuit with High Tc Superconductors.- dc Bias Margin of Non-Latch Single Flux Quantum Logic.- Logic Operation Using a High-Tc Superconducting Weak Link.- Change of the Performance of BiSrCaCuO dc-SQUID with the Passage of Time.- Analysis of High-Tc SQUIDs with Large Capacitance Components.- YBa2Cu3O7 Single Layer dc SQUID Magnetometer.- Study of Nondestructive Evaluation Using High-Tc dc-SQUID.- Non Destructive Testing Using the SQUID with Integrated Gradiometer.- 7.3 Microwave Devices.- Recent Progress in High-Tc Superconducting Power Filters.- Film Stability of YBa2Cu3Oy Microwave Resonator in Humid Conditions.- 100 GHz Wide-Band Phase Control HTS Mixer.- Internal Anisotropic Microwave Frequency Noise in HTSC BSCCO and YBCO Junctions.- Noise Temperature Study of Weak-Link Josephson Junction Array Mixers in a mm-Wave Range.- Case Size Dependence of High Temperature Superconductor Microstrip Bandpass Filter.- Dual Frequency Operation Microstrip Antenna System Fed by Coplanar-Waveguide.- Design and Fabrication of Metal and Superconducting Meander-Line Antennas.- Design and Characterization of Superconducting Patch Antenna.- Low-Temperature Vector Network Measurement of Reflection Coefficients of Tl2Ba2CaCu2Ox/MgO/Au Transmission Lines.- Investigation of Y-Ba-Cu-O Microstripline Resonators by Electromagnetic Field Simulation.- 7.4 Other Superconducting Devices.- Superconductor-Insulator Transition and Size Effect of an YyPr1-yBa2Cu3O7-x Channel in a Field Effect Transistor.- Fabrication and Electric Properties of (Ba,Rb)BiO3 Base Transistor with In2O3 as a Collector Barrier.- Analysis of a Resonance Mode in a Parallel Array of SNS Josephson Junctions with Small Penetration Depth.- Ba1-xKxBiO3/SrTiO3:Nb Oxide Heterojunctions.- High Quality SrTiO3/YBa2Cu3O7-x Bi-Layer Growth for Electric Field Devices.- Study on Ultra-Thin YBa2Cu3O7-x Film Deposition by MBE.- The Possibility of Superconducting Magnetometer for Field Work Application.- Focusing Length of High-Tc Bulk Superconductor Lenses for Intense Electron Beams.- Fabrication of a 5-mm-Wide YBCO Coplanar Delay Line.- Ultrashort Electromagnetic Pulse Radiation from YBCO Thin Films by Femtosecond Laser Pulse Irradiation.- 8 System Applications: 8.1 Electric Power Apparatus.- Compact High-Tc Superconducting Power Cable: Summary and Prospects.- 50m-Long High-Tc Superconductor for Power Cables.- Development of 50m-Long HTS Cable Conductor.- Design Study of High-Tc SMES.- Experimental Results of a Modified D Shaped Toroidal Coil for 1kWh/1MW Experimental SMES System.- Study on 1kWh CFRP Flywheel for High Temperature Superconducting Magnetic Bearing for Energy Storage System.- Study on High Temperature Superconducting Magnetic Bearings of 1kWh Flywheel for Energy Storage System.- Current Limiting Characteristics of Magnetic Shield Type Superconducting Fault Current Limiter.- High Tc Superconducting Fault Current Limiter with Flux-Lock Reactors and ac Magnetic Field Coil.- A New HTSC-Bulk Motor.- Numerical Analysis of Electromagnetic Phenomena in Bulk Superconductors Under the Influence of an Applied Traveling Field.- 8.2 Magnetic Levitation and Magnetic Bearings.- Active Magnetic Levitation with YBCO Samples.- Rotor Dynamics in High-Tc Superconducting Levitation.- Numerical Evaluation of Levitation Force of a Thin Film High Tc Superconductor.- The Use of Iron-Cored HTS Magnets for EMS Maglev.- A Design of a Superconducting Hybrid Magnet for a Magnetic Levitation System.- Dynamics of a Hybrid Electromagnetic Suspension Using Bulk Superconducting Material as a Flux Source.- Mixed-m Magnetic Levitation System Using the High Temperature Superconductors.- Influence of Magnet Quenching on the Dynamics of the Superconducting Magnetically Levitated Train.- 8.3 Current Lead, Bus Bar, and Persistent Current Switching.- Current Lead Spirally Assembled Ag-Au Sheathed Bi-2223 Superconducting Wires.- 1.5kA Melt Textured YBa2Cu3O7 Current Leads for High Temperature and High Field Applications.- High-Tc Current Leads for Maglev System.- Very Large dc Current Carrying High-Tc Bus Bar.- Switching Characteristics of a Magnetic PCS at lkA Persistent Current Mode.- Switching Time Analysis of Nb3Sn Persistent Current Switches.- Characteristics of Contact Resistance Between NbTi Electrodes.- 8.4 Magnetic Shielding and Other Applications.- HTS Magnetic Shielding System Combined with Platecoil.- Magnetic Shielding Effect of Superconducting Plates with Multiple-Layer Structure.- Magnetic Shielding Effects of Powdered Oxide Superconductors.- Magnetic Shielding Performance and Flux Creep in Bi-2212 Cylinders.- Development of 1 GHz Class NMR Spectrometer Magnet at NRIM.- Superconducting Magnet Technology for Special Applications.- A Case Study of a Bulk Magnet Using High-Tc Superconductors.- Numerical Analysis of Magnetization Properties of a Superconductor with the Ginzburg-Landau Theory.- Author Index.- Key Word Index.