| 摘要 |
PURPOSE:To increase the superconducting transition temp. of a thin film superconductor by alternately laminating a thin Bi-type superconducting film and a thin Bi-W-type oxide film periodically. CONSTITUTION:A thin superconducting film of lamellar oxide, such as Bi-Sr-Ca- Cu-O, having a composition containing, as principal components, Bi-containing oxide, Cu, and alkaline earth elements (group IIa) and a thin film of lamellar oxide, such as Bi-W-O, having a composition containing, as principal components, at least Bi and W are laminated on a base material alternately and periodically. At this time lamination is carried out by means of vapor deposition, etc. By this method, a laminated film of the thin Bi-type superconducting film and the insulating film can be obtained with superior reproducibility, and the superconducting transition temp. inherent in the thin Bi-type superconducting film can be increased.
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