ENHANCEMENT OF CRITICAL CURRENT-DENSITY IN YBA2CU3O7-DELTA

被引：8

作者：

HUANG, ZJ ^{[1
]}

XUE, YY ^{[1
]}

KULIK, J ^{[1
]}

SUN, YY ^{[1
]}

HOR, PH ^{[1
]}

机构：

[1] UNIV HOUSTON,DEPT PHYS,HOUSTON,TX 77204

来源：

PHYSICA C | 1991年 / 174卷 / 1-3期

基金：

美国国家科学基金会; 美国国家航空航天局;

关键词：

D O I：

10.1016/0921-4534(91)90444-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The critical current density (J(c)), activation energy (U0), and the microstructure have been studied for a YBa2Cu3O7-delta (Y123) sample made from the decomposition of YBa2Cu4O8-delta (Y124). An enhancement of J(c) up to 10(6) A/cm2 has been observed at 77 K at low magnetic field. However, U0 is the same as that of ordinary Y123. At high field, no J(c) enhancement has been observed. Our TEM study has revealed a high density of stacking faults (double Cu-O layers) suggesting that these are the defects which are responsible for the J(c) enhancement. The enhanced J(c) and similar U0 imply collective pinning in this high temperature superconductor (HTS).

引用

页码：253 / 257

页数：5

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