BULK SUPERCONDUCTING Y2BA4CU7O15-DELTA AND YBA2CU4O8 PREPARED IN OXYGEN AT 1-ATM

被引：116

作者：

POOKE, DM

BUCKLEY, RG

PRESLAND, MR

TALLON, JL

机构：

[1] Physics and Engineering Laboratory, Department of Scientific and Industrial Research, Lower Hutt

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.41.6616

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Synthesis of bulk Y2Ba4Cu7O15- and YBa2Cu4O8 high-Tc superconductors at atmospheric pressure, without the addition of alkali rate enhancers, is reported. The superconducting transition temperature for Y2Ba4Cu7O15- is shown to depend on oxygen stoichiometry, with the resistive onset observed above 90 K. The YBa2Cu4O8 phase has zero resistance Tc close to 80 K. A modified Y-Ba-Cu-O P-T phase diagram is presented. © 1990 The American Physical Society.

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页码：6616 / 6620

页数：5

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