Preparation of thin films by coevaporation and phase identification in Bi-Sr-Ca-Cu-O system

被引：0

作者：

Yoshitake, Tsutomu ^{[1
]}

Satoh, Tetsuro ^{[1
]}

Kubo, Yoshimi ^{[1
]}

Igarashi, Hitoshi ^{[1
]}

机构：

[1] NEC, Japan

来源：

Japanese Journal of Applied Physics, Part 2: Letters | 1988年 / 27 pt 2卷 / 06期

关键词：

Bismuth Compounds--Thin Films - Ceramic Materials--Thin Films - Heat Treatment--Annealing - X-Rays--Diffraction;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Thin films of a Bi-Sr-Ca-Cu-O system were prepared on MgO substrate by coevaporation of Bi2O3, Sr0.5Ca0.5 alloy and Cu. The films were characterized by X-ray diffraction, dc resistivity and EPMA. By post-deposition annealing the film at 850°C for 12 hours, the film showed a superconducting transition with onset Tc of 91 K and zero resistance Tc of 82 K. The tetragonal phase Bi2 Sr2CaCu2Ox with a c-axis of 30.7 angstrom was responsible for this superconducting transition. The film annealed at 890°C for 5 hours showed a superconducting transition with onset Tc of 115 K and zero resistance Tc of 103 K. The tetragonal phase Bi2Sr2Ca2Cu3Ox with a c-axis of approximately 37 angstrom was responsible for this superconducting transition.

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