SUPERCONDUCTIVITY IN LA2-XSRXCACU2O6 AT 60-K - INVESTIGATION OF DOPING AND HIGH-PRESSURE ANNEALING

被引：21

作者：

LIU, HB

MORRIS, DE

SINHA, APB

TANG, XX

机构：

[1] Morris Research Inc., Berkeley, CA 94704

来源：

PHYSICA C | 1991年 / 174卷 / 1-3期

关键词：

D O I：

10.1016/0921-4534(91)90417-W

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A systematic investigation of the effect of oxygen pressure during annealing and of varying Sr content on the structural and superconducting properties of La2-xSrxCaCu2O6 has been carried out. To get the highest T(c) of 60 K, the required annealing pressure was 200 bar of oxygen at 970-degrees-C. This T(c) = 60 K sample has FACV approximately 2.17 and an oxygen content of 6.02-6.05 per formula unit. Although many variations in the preparation conditions were tried, the 60 K superconductor was always found to be associated with an impurity phase La(8-x)SrxCu8O20. The amount of this impurity phase increased with increasing Sr content and with increasing oxygen pressure.

引用

页码：28 / 32

页数：5

共 7 条

[1] SUPERCONDUCTIVITY AT 60-K IN LA2-XSRXCACU2O6 - THE SIMPLEST DOUBLE-LAYER CUPRATE [J].