CALCIUM-SUBSTITUTED SUPERCONDUCTING RBA2CU4O8 WITH TC-OKSIMLR-90-K PREPARED AT ONE ATMOSPHERE

被引：83

作者：

BUCKLEY, RG

TALLON, JL

POOKE, DM

PRESLAND, MR

机构：

[1] Physics and Engineering Laboratory, DSIR, Lower Hutt

来源：

PHYSICA C | 1990年 / 165卷 / 5-6期

关键词：

Calcium and Alloys - Ceramic Materials - Yttrium Compounds;

D O I：

10.1016/0921-4534(90)90372-L

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Calcium substituted RBa2Cu4O8 with R = Y and Er has been prepared between 805°C and 830°C under oxygen at one atmosphere. The zero-resistance Tc is displaced up from 79 K (unsubstituted) to 87 K at 10% substitution. This compound has the benefit of a high-Tc while circumventing the problems of oxygen-loading and associated microcracking. The substitution level of 10% lies at the solubility limit under the preparation conditions used and neither prereaction at higher temperatures, nor the use of co-substitution with La assisted in obtaining higher substitution levels. © 1990.

引用

页码：391 / 396

页数：6

共 12 条

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