YBaCuO and TlBaCaCuO Superconductor Thin Films via an Electrodeposition Process

• Published in: Journal of the Electrochemical Society 1992-01, Vol.139 (1), p.67-69
• Main Authors: Bhattacharya, R. N., Parilla, P. A., Noufi, R., Arendt, P., Elliott, N.
• Format: Article
• Language: English
• Subjects: 360207 - Ceramics, Cermets, & Refractories- Superconducting Properties- (1992-); 400400 - Electrochemistry; 665411 - Basic Superconductivity Studies- (1992-); 665412 - Superconducting Devices- (1992-); ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; BARIUM OXIDES; CALCIUM COMPOUNDS; CALCIUM OXIDES; CHALCOGENIDES; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COPPER COMPOUNDS; CRITICAL CURRENT; CUPRATES; CURRENT DENSITY; CURRENTS; DEPOSITION; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; ELECTRODEPOSITION; ELECTROLYSIS; FABRICATION; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; LYSIS; MAGNETIC FIELDS; MANGANESE COMPOUNDS; MANGANESE OXIDES; MATERIALS SCIENCE; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; REDOX POTENTIAL; SUBSTRATES; SUPERCONDUCTING FILMS; SUPERCONDUCTIVITY; SURFACE COATING; THALLIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; ZIRCONIUM COMPOUNDS; ZIRCONIUM OXIDES
• ISSN: 0013-4651; 1945-7111
• DOI: 10.1149/1.2069202

Thin-film superconductors of YBaCuO (YBCO) and TlBaCaCuO (TBCCO) were fabricated via an electrodeposition process. The YBCO superconductor precursor thin films were deposited at potentials ranging from -2.5 to -4 V vs. an Ag/AgNO3 reference electrode. The YBCO films were deposited under both constant and pulsed-potential conditions. The post-annealed YBCO films showed zero resistance of approximately 74 K on Ni, 78 K on MgO, and 91 K on ZrO2 substrates. The best critical current densities obtained for the YBCO films at 4 K and zero magnetic field and their respective substrates are as follows: 4OOO A/cm2 on [1OO] ZrO2, 396O A/cm2 on [1OO] MgO (constant potential), 516O A/cm2 on [1OO] MgO (pulsed potential), 5OO A/cm2 on a Ni strip, 325 A/cm2 on a Ni wire, and 5OO A/cm2 on a Ag wire. The precursors of the superconducting TBCCO films were codeposited at a constant potential of -4 V and also under pulsed-potential conditions. The post-annealed TBCCO films showed zero resistance at about 102 K on SrTiO3 substrate. The critical current density at 76 K of a TBCCO film deposited at constant potential on a silver-coated SrTiO3 substrate was 2OOOO A /cm2 in zero magnetic field and 5OOO A/cm2 in a 1O kOe field parallel to the film plane. The critical current density of pulsed-potential deposited TBCCO film on SrTiO3 was 56OOO A/cm2 at 76 K in zero field. 8 refs.