AR PREPARATION OF PB RICH 2212 SUPERCONDUCTORS IN THE BPSCCO SYSTEM

被引：11

作者：

SCHLICHENMAIER, M

KEMMLERSACK, S

机构：

[1] Institut für Anorganische Chemie der Universität, W-7400 Tübingen

来源：

PHYSICA C | 1992年 / 198卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(92)90282-H

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In the BPSCCO system of type 2212 a clear correlation between the Pb content, the structural modulation and the dimensions of the subcell exists. Pb-rich 2212 material is modulation-free and has been prepared with high purity via solid state reaction in flowing Ar. A transition to superconductivity at about 90 K is directly obtained. The superconductivity is bulk (Meissner fraction: 20-30%). The existence of modulation-free 2212 superconductors demonstrates that neither interstitial oxygen nor structural modulation is necessary for the occurrence of superconductivity.

引用

页码：175 / 180

页数：6

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