Preparation of Tc = 109 K Bi-Sr-Ca-Cu-O superconducting thin films from Amorphous Bi-O/Sr-Ca-Cu-O structures

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[1] Usuki, Tatsuro
[2] Yasui, Ichiro
[3] Yoshisato, Yorinobu
[4] Nakano, Shoichi
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Usuki, Tatsuro | 1600年 / 29期
关键词：
Bismuth Compounds - Ceramic Materials - Crystallization - Electron Beams - Microscopic Examination--Scanning Electron Microscopy;
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摘要：
The successful preparation of superconducting Bi-Sr-Ca-Cu-O thin films has been obtained by a new method based on an annealing process of amorphous Bi-O/Sr-Ca-Cu-O layers. Films of Bi-O were deposited on as-sputtered Sr-Ca-Cu-O films on MgO substrates by electron beam evaporation. These Bi-O films were diffused uniformly into Sr-Ca-Cu-O films for crystallization to Bi-Sr-Ca-Cu-O by annealing. A zero resistance temperature as high as 109 K was achieved for a 150 nm-thick sample, in spite of an absence of Pb.
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