High-temperature X-ray study of melting and solidification of the Bi2Sr2CaCu2O8+δ on silver

被引：6

作者：

Hatano, T ^{[1
]}

Kim, CS

Kitaguchi, H

Kumakura, H

Togano, K

机构：

[1] Natl Res Inst Met, Tsukuba, Ibaraki 3050047, Japan

[2] Korea Res Inst Stand & Sci, Taejon 305600, South Korea

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 1999年 / 117卷 / 3-4期

关键词：

Magnetic Material; Partial Melting; Critical Current; Phase Coexist; Subsequent Solidification;

D O I：

10.1023/A:1022561731803

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The melting and solidification of a Bi2Sr2CaCu2O8+delta compound on Ag were studied by in-situ high-temperature x-ray analysis. Bi2Sr2CaCu2O8+delta/Ag samples were heated by the heating schedule known as 'partial melting and slow cooling' under a 1-100%-O-2/He gas pow. A strong c-axis alignment of the Bi2Sr2CaCu2O8+delta crystals was observed at the incongruent-melting temperature where the Bi2Sr2CaCu2O8+delta and the molten phase coexist. Similarly, a strong c-axis alignment was observed at the initial stage of solidification. However, the subsequent solidification of the residual molten phase caused less aligned Bi2Sr2CaCu2O8+delta on Ag. An improved heating schedule is proposed which increases the critical current of Bi2Sr2CaCu2O8+delta/Ag superconducting tapes.

引用

页码：777 / 781

页数：5