OXYGEN DESORPTION EFFECTS ON THE SUPERCONDUCTING PROPERTIES OF BI1.8PB0.2SR2.2CA1.9CU3.0OX

被引：8

作者：

DONNELLY, K ^{[1
]}

LAWLER, JF ^{[1
]}

COEY, JMD ^{[1
]}

RAVEAU, B ^{[1
]}

机构：

[1] INST SCI MAT & RAYONNEMENT,CRISMAT,F-14032 CAEN,FRANCE

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1991年 / 4卷 / 01期

关键词：

D O I：

10.1088/0953-2048/4/1/006

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Single-phase Bi1.8Pb0.2Sr2.2Ca1.9Cu3.0O(x) superconducting ceramics with T(c) = 107(1) K have been studied by thermopiezic analysis and thermogravimetry. Samples lose very little oxygen (DELTA-x congruent-to -0.1) on heating in vacuum up to the melting point at 885-degrees-C in vacuum. On heating in hydrogen, samples appear to lose oxygen from a skin around each crystallite with the core remaining relatively unaffected. The skin is amorphous and non-superconducting and alters the weak-link superconducting nature of the ceramic to one of isolated superconducting islands. Superconductivity can be restored throughout the sample by heating in oxygen.

引用

页码：27 / 31

页数：5

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