Science and Technology of Thin Film Superconductors 2, 1990

This conference is the second on the Science and Technology of Thin Film Superconductors. It proved to be an excellent forum for these specialists in thin film superconductivity. The conference, held April 30-May 4, 1990, in Denver, Colorado, hosted 170 researchers from 17 countries. The response to the conference again emphasized the need for a meeting devoted to the science and technology of thin film superconductors. The breadth of artic1es and advances made in this technology since the first conference in November 1988, reflect on the maturity of the topic. These proceedings contain artic1es on deposition methods by sputtering, e1ectron beam evaporation, resistive evaporation, laser ablation, chemical vapor deposition and electrodeposition, and on other studies related to substrates, thermodynamics of formation, grain boundaries and weak links, characterization, and some practical applications. The program committee was pleased with the quality of the publications and contributed articles. This conference was highlighted by a fuU day dedicated to presentations from the federallaboratories, discussing a wide range of topics on the fabrication, characterization, and theory of high-temperature superconductor thin films. Other highlights at the conference dealt with (1) critical parameters or problems in measuring critical current density and other important parameters, and (2) problems of scale-up, reproducibility, and amenability to device fabrication. It became evident from the presentations that three issues were developing into critical issues for the ultimate practical application of high­ temperature superconductor thin films.

Sputtering.- Cathodic Sputtering as a Tool for the High-Tc Superconducting Materials Processing.- Properties of Epitaxial YBa2Cu3O7/PrBa2Cu3O7 Heterostructures Sputtered at High Oxygen Pressures.- Superconducting Properties of YBa2Cu3O7/PrBa2Cu3O7 Superlattices.- Factors Affecting Formation of In Situ and 110 K Phase Sputtered Bi-Based Superconducting Thin Films.- In-Situ Growth of Superconducting Films of Bi-Sr-Ca-Cu-O Using Magnetron Sputtering.- Highly-Textured T1-Ba-Ca-Cu-O Polycrystalline Superconducting Films on Ag Substrates.- YBCO and LSCO Films Grown by Off-Axis Sputtering.- Thin Films of Y1Ba2Cu3O7?? Prepared by 3-Target Co-Sputtering.- Compositional Modifications in Target and Sputtered Y-Ba-Cu-O Films on Annealing.- Control of Thickness and Composition Uniformity in Sputtered Superconducting Thin Films.- Growth Analysis and Properties of Sputter-Deposited YBaCuO Thin Films.- Reproducible Fabrication of YBa2Cu3O6+? Thin Films by DC Magnetron Sputtering.- High Tc YBa2Cu3O7?x and T1mCanBa2Cun+1Ox Thin Films by Sputter Deposition from Stoichiometric Oxide Targets.- In Situ Epitaxial Growth of the Gd-Ba-Cu-O Superconducting Thin Films on (100) LaAlO3 by DC-Magnetron Sputtering Using Single Planar Target.- In-Situ Growth of Y-Ba-Cu-O Films by High Pressure DC Sputtering.- Growth of YBaCuO Superconducting Thin Films by Hollow Cathode Magnetron Sputtering.- Deposition of YBa2Cu3O7 Films on Sapphire by RF Triode Sputtering.- The Growth and Characterization of Pb-Doped Bi-Sr-Ca-Cu-O Thin Films.- In-Situ Epitaxial Growth of High Tc RBa2Cu3O7 Thin Films on SrTiO3, MgO and Y-ZrO2 Substrates.- Growth of YBCO Superconducting Thin Films by Magnetron Sputtering.- Preparation of Bi(Pb)-Sr-Ca-Cu-O Thin Films with Tc(Zero) at Above 100K.- Laser Deposition.- High Tc Superconducting Layered Structures and Superlattices.- Preparation and Properties of Laser Deposited High Tc Films.- YBa2Cu3O7?x Thin Film Growth on Single Crystal and Polycrystalline Yttria-Stabilized Zirconia.- Modern Laser Technology of Deposition, Diagnostics and Topology Formation of Y-Ba-Cu-O Thin-Film Superconductors.- In Situ YBCO Thin Films Made by Laser Deposition.- Electrical and Magnetic Analysis of YBa2Cu3O7?x Superconducting Films Grown by Laser Ablation.- YBCO Films and YSZ Buffer Layers Grown In Situ on Silicon by Pulsed Laser Deposition.- In-Situ Deposited Superconducting Laser Ablated Thin Films of Y1Ba2Cu3Ox and Bi0.8Pb0.2Sr0.8Ca1Cu1.6Ox.- Pulsed Laser Deposition of Tl-Ca-Ba-Cu-0 Films at 248 nm.- Superconductivity in Single Unit Cell YBa2Cu3O7?x Layers in YBa2Cu3O7?x/PrBa2Cu3O7?x Superlattices.- New and Different Growth Techniques.- Low Temperature Fabrication of YBa2Cu3O7?x High-Tc Superconducting Thin Films by Plasma-Enhanced Metalorganic Chemical Vapor Deposition.- Preparation and Physical Properties of Bi-Sr-Ca-Cu-O Films Grown by Molecular Beam Epitaxy Using Pure Ozone.- Formation of Passivation Films on High-Tc Superconducting Thin Films by Plasma Processing.- Superconductor Thin Films Via an Electrodeposition Process.- Improved T1-Ca-Ba-Cu-O Thin-Film Superconductors.- Preparation Study of Bi-Sr-Ca-Cu-Oxides Superconducting Thin Films by Resistive Evaporation.- A Radio-Frequency Glow Discharge Ion Gun for Preparation of High Tc Oxide Superconductor Surfaces.- In-Situ Growth of Superconducting Single Crystal Bi-Sr-Ca-Cu-O Thin Films by Molecular Beam Epitaxy.- Preparation of YBaCuO Films by e-Beam Evaporation and the Effect of Hydrogen Charging on the Electrical Transport Properties.- High-Temperature Superconducting Films Prepared by Low-Pressure RF-Plasma Deposition.- Single Source Electron Beam Evaporation of Bi-Sr-Ca-Cu-O Thin Films.- Preparation of Superconducting T1-Ba-Ca-Cu-O Films by Diffusion Method.- Sandwich Tunnel Junction with DyBaCuO Grown by Molecular Beam Atomic Layer Epitaxy.- Y-Ba-Cu-O Superconducting Thin Films Deposited by Rapid Isothermal Processing MOCVD.- Superconducting Y1Ba2Cu3O7?? Films by RF Plasma Aerosol Evaporation at Atmospheric Pressure.- Characterization.- Grain Structure and Grain Boundaries in High Tc Superconducting YBa2Cu3O7?x Thin Films.- Characterization of the Surface of Oxide Superconductors.- Weak Link Properties of YBa2Cu3O7?? Thin Film Grain Boundaries.- Microstructures of Superconducting YBa2Cu3O7?x Thin Films.- In-Situ Rheed Studies of Initial Growth Stages of YBCO-Films by Thermal Co-Evaporation.- Superconducting Properties of YBa2Cu3O7?x Thin Films by Plasma Enhanced Metal Organic Chemical Vapor Deposition.- In Situ Preparation and Surface Investigations of Y1Ba2Cu3O7?x, Bi2Ca1Sr2Cu2Ox and Nd1.85Ce0.15CuO4?x HTSC Films.- Relationship of Microstructures in YBa2Cu3O7?x with Growth Conditions and Superconducting Properties.- Microstructure Development in Thin-Film Superconductors.- Characterization of RF-Sputtered Lanthanum Aluminate Thin Films.- Superconductor Properties.- Correlation Between Insitu Growth Conditions and Thermodynamic Stability Criteria for Y1Ba2Cu3Oy.- YBa2Cu3O7?x Thin Films: Some Problems of Synthesis and Ways to Solve Them.- Electron Tunneling Into Thin Films of YBa2Cu3O7.- Infrared Studies of Laser-Deposited High-Tc Films.- Correlation of Normal and Superconducting Properties and Unified Approach in the Theory of High Tc.- Magnetic Field Induced Broadening of the Resistive Transition in Epitaxial Films of YBa2Cu3O7 and Y2Ba4Cu8O16.- Novel Procedure for Mapping the Jc-Hc2-Tc Surface and Its Application to High Temperature Superconductors.- Flux Motion Effects in Tl-Ca-Ba-Cu-O Thin Films.- Photoresistive Response of Superconducting Thin Films.- Critical Current in High Magnetic Field of Y-Ba-Cu Oxide Films Prepared by CVD Method.- Correlation of Thermoelectric Power, Meissner Effect and Oxygen Content of YBa2Cu3O7?x High Tc Superconductors.- Measurement of Some Electrical Properties of Arsenic Oxide Doped Thin Films of Gd1Ba2Cu3O7??.- RF Residual Losses, Surface Impedance and Granularity in Superconducting Cuprates.- Influence of Phase Fluctuations in Dynamical Magnetoconductance Measurements of Both Square and Fractal Wire Networks.- Contacts to Bi-Sr-Ca-Cu Oxide Superconducting Thin Films.- Effect of Short Coherence Length on the Critical Current.- Thin Films of YBa2Cu3O7 on LaAlO3.- Magnetoresistance Near Gd Neel Temperature in GdBa2Cu3Oy Films.- High Frequency Characteristics of 1-2-3 Films on MgO Substrates Grown by Activated Reactive Evaporation.- Mutual Inductance of Thin Film Pb-Bi-Sr-Ca-Cu-O Films.- Transient Thermoelectric Effect and Carrier Dynamics of YBa2Cu3O7?? Thin Films.- Transport Properties of High Temperature Superconducting Thin Films in Large Magnetic Fields.- Orientation Dependence of Critical Currents in a-Axis Oriented YBCO Thin Films.- Dependence of Millimeter Wave Surface Resistance on the Deposition Parameters of Laser Ablated YBa2Cu3Ox Thin Films.- Supercurrent Tunnelling Between Conventional and Unconventional Superconductors.- Applications.- Progress Towards a YBCO Circuit Process.- The Present Situation of High-Temperature Superconducting Thin Films for Electronic Devices.- Present Status and Future of dc SQUIDs Made from High-Tc Superconductors.- Progress Towards Superconducting Electronics with High-Tc Thin Films.- High-Tc Superconducting Infrared Detectors.- Selective Heteroepitaxial Growth of MgO/YBaCuO System and Application to New Electronic Devices.- Stripline Resonators for Characterization of High-Tc Superconducting Films for Device Applications.- The NRL High Transition Temperature Superconductor Space Experiment (HTTSSE).- Planar Microwave High Tc Superconducting Circuit Testing and Ring Resonator Design.- Optical Detection with YBCO Thin Films.- Submicron Lithography on YBCO Thin Films.- Sequentially Evaporated Thin Film YBa2Cu3O7?x Superconducting Microwave Ring Resonator.- Participants.