Flux jumps in YBa2Cu3O7 single crystals at low temperature and fields up to 11 T

被引：8

作者：

Khene, S

Barbara, B

机构：

[1] Univ Mokhtar Badji Annaba, Inst Phys, Annaba 23000, Algeria

[2] CNRS, Lab Louis Neel, F-38042 Grenoble 9, France

来源：

SOLID STATE COMMUNICATIONS | 1999年 / 109卷 / 11期

关键词：

high-T-c superconductors; crystal growth; point defects;

D O I：

10.1016/S0038-1098(98)00518-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetic hysteresis measurements on single crystal YBa2Cu3O7 superconductors were performed in fields between -11 and 11 T for several temperatures and held sweep rates with a conventional magnetometer. Many flux jumps have been observed in the magnetization curves at low temperatures. A decrease of the jump-starting field H-fj with the increase of the field sweep rate and an increase of H-fj with the increase in temperature are observed. It is shown that the flux jumps depend on the transition temperature of the crystal. Our results suggest that green phase inclusions improve the magnetic stability of the single crystals. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：727 / 731

页数：5

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