Current limiting effect of residual Bi2Sr2CuO6 in silver-sheathed (Bi,Pb)2Sr2Ca2Cu3O10 superconductors

被引：42

作者：

Guo, YC ^{[1
]}

Horvat, J ^{[1
]}

Liu, HK ^{[1
]}

Dou, SX ^{[1
]}

机构：

[1] Univ Wollongong, Ctr Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1998年 / 300卷 / 1-2期

基金：

澳大利亚研究理事会;

关键词：

superconductor; Bi2Sr2CuO6; current limiting factor; weak links;

D O I：

10.1016/S0921-4534(98)00071-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A controversial issue in the study of Bi-based superconductors is the role of Bi2Sr2CaCu2O8 in determining the properties of silver-sheathed (Bi,Pb)(2)Sr2Ca2Cu3O10 (Bi2223) tapes. In this study, we prepared a series of Bi2223/Ag tapes with different Bi2Sr2CaCu2O8 (Bi2212) and Bi2Sr2CuO6 (Bi2201) ratios and investigated its effect on electrical and magnetic properties. It was. found that residual Bi2201, instead of Bi2212, was the limiting factor for the critical current (I-c). Elimination of Bi2201 using a two-step sintering process in the final thermal cycle, or by cooling the tapes slowly, increased I-c by a factor of 2. The flux pinning and irreversibility field behavior were also improved by removing Bi2201. (C) 1998 Elsevier Science B.V.

引用

页码：38 / 42

页数：5

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