Phase compatibility and superconductivity of Y-Ba-Cu-O compounds

被引：0

作者：

Wadayama, Yoshihide ^{[1
]}

Kudo, Kotaro ^{[1
]}

Nagata, Akihiko ^{[1
]}

Ikeda, Keisuke ^{[1
]}

Hanada, Shuji ^{[1
]}

Izumi, Osamu ^{[1
]}

机构：

[1] Tohoku Univ, Japan

来源：

Japanese Journal of Applied Physics, Part 2: Letters | 1988年 / 27卷 / 07期

关键词：

Ceramic Materials - Oxides - Superconductivity;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Superconducting properties of Y-Ba-Cu-O compounds were investigated in relation to precipitation of second phases. Contour lines of Jc, Tc and diamagnetic signal intensities were presented in the YO1.5-BaO-CuO system. These superconducting properties decreased steeply with BaCuO2 precipitation, and the maximum Jc was obtained in the yttrium-rich composition of Y1.2Ba2Cu3O7-y. It is considered, therefore, that the BaCuO2 precipitating around the YBa2Cu3O7-y grains interrupt the superconducting current pass at the grain boundary. Yttrium-rich composition, which inhibits BaCuO2 precipitation, is effective for the preparation of the high-Jc sample.

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