Degradation in Bi-Sr-Ca-Cu-O thin films exposed to water

A study of Bi-Sr-Ca-Cu-O thin films soaked in water demonstrated that film superconductivity was degraded by exposure to water. ICP analysis showed that Sr and Ca, but no Bi and Cu, largely dissolved. EPMA analysis indicated that dissolution took place mostly in nonsuperconducting grains. By contras...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1988-12, Vol.27 (12), p.L2324-L2326
Main Authors: YOSHIKAWA, K, YOSHIDA, M, NAKANO, M
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Mechanical and acoustical properties
adhesion
Physics
Solid surfaces and solid-solid interfaces
Solid-fluid interfaces
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Summary:A study of Bi-Sr-Ca-Cu-O thin films soaked in water demonstrated that film superconductivity was degraded by exposure to water. ICP analysis showed that Sr and Ca, but no Bi and Cu, largely dissolved. EPMA analysis indicated that dissolution took place mostly in nonsuperconducting grains. By contrast, XRD patterns showed no significant change after soaking. That is, superconducting grains were indeed stable, but nonsuperconducting grains were notably degraded in polycrystalline films, with a consequent lowering of overall superconductivity.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.27.l2324