Magnetic instability in YBa2Cu3O7-δ films

被引：18

作者：

Bolz, U ^{[1
]}

Eisenmenger, J ^{[1
]}

Schiessling, J ^{[1
]}

Runge, BU ^{[1
]}

Leiderer, P ^{[1
]}

机构：

[1] Univ Konstanz, Fac Phys, D-78457 Constance, Germany

来源：

PHYSICA B | 2000年 / 284卷

关键词：

flux flow; magnetooptic imaging; YBaCuO films;

D O I：

10.1016/S0921-4526(99)02060-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Using a magneto-optic technique we have investigated the magnetic flux propagation into and out of superconducting thin YBa2Cu3O7-delta films. After field cooling below T-c, the external magnetic field B-ext perpendicular to the film is changed which gives rise to shielding currents in the sample. The current distribution is disturbed momentarily by heating with a focused laser pulse near the sample edge. This triggers a magnetic instability, in which a magnetic flux avalanche starts to propagate. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：757 / 758

页数：2