Jpn. J. Appl. Phys. 27 (1988) pp. L1262-L1264 |Next Article| |Table of Contents|
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Letter
Preparation of 107 K Superconducting Thin Film in Bi-Sr-Ca-Cu-O System by Coevaporation
Tsutomu Yoshitake,
Tetsuro Satoh,1
Yoshimi Kubo and
Hitoshi Igarashi
Fundamental Research Laboratories, NEC Corporation
1Resources and Environment Protection Research Laboratories, NEC Corporation
(Received May 13, 1988; accepted for publication June 17, 1988)
Thin films of the Bi-Sr-Ca-Cu-O system were prepared on (100)MgO substrates by coevaporation of Bi2O3, Sr-Ca alloy and Cu metal, and the effects of film composition and annealing time on superconducting trasition temperatures were investigated. By post deposition annealing at 890°C for a long time, the films with relatively high-Ca compositions showed a superconducting transition with a zero-resistance Tc of 107 K. A high-Ca composition and long annealing time were necessary to prepare films with a zero-resistance Tc over 100 K.
URL:
http://jjap.jsap.jp/link?JJAP/27/L1262/
DOI: 10.1143/JJAP.27.L1262
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