Chemical fabrication of superconducting Y-BA-Cu oxide films

Journal Article · Sat Feb 01 04:00:00 EST 1992 · Journal of Superconductivity; (United States)

DOI:https://doi.org/10.1007/BF00617990· OSTI ID:5003488

Hussain, A A; Sayer, M ^[1]

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1. Queen's Univ., Kingston, Ontario (Canada)

High-{Tc} superconducting films of Y-Ba-Cu oxide were prepared on (100) MgO substrates by a chemical sol gel method. A procedure is described for preparing a superconducting film using acetate compounds dissolved in salicylic or lactic acids in the presence of ethylene glycol. This solution has superior qualities in terms of homogeneity, viscosity, and stability against atmospheric hydration. The results indicate that the nature of the solvent influences the microstructure and superconducting properties of Y-Ba-Cu-O films. X-ray diffraction analysis reveals that the annealed films are textured and had orthorhombic orientation. Transport measurements indicated that the onset temperature of the superconducting transition occurred between 82 and 95 K. The zero-resistance transitions temperature was above the boiling point of the liquid nitrogen. The highest critical current density was 2,700 A/cm{sup 2} at 20 K. It is also demonstrated experimentally that the results obtained from the X-ray diffraction analysis alone cannot provide a good criterion for evaluating the quality of a superconductor. A correlation between the crystal structure and the superconducting properties of the Y-Ba-Cu-O films is presented.

• OSTI ID: 5003488
• Journal Information: Journal of Superconductivity; (United States), Journal Name: Journal of Superconductivity; (United States) Vol. 5:1; ISSN 0896-1107; ISSN JOUSE
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CORRELATIONS
CRITICAL CURRENT
CRYSTAL STRUCTURE
CURRENT DENSITY
CURRENTS
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
FABRICATION
FILMS
HIGH-TC SUPERCONDUCTORS
HYDRATION
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
SOLVATION
SUBSTRATES
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS
YTTRIUM OXIDES