INFLUENCE OF TWINS ON THE CRITICAL-CURRENT IN YBACUO SINGLE-CRYSTALS

被引：26

作者：

DOROSINSKII, LA

NIKITENKO, VI

POLYANSKII, AA

VLASKOVLASOV, VK

机构：

[1] Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Moscow distr.

来源：

PHYSICA C | 1994年 / 219卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90017-5

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Induction profiles in an inhomogeneously twinned YBa2Cu3O7-delta single crystal were measured using a recently developed magneto-optic technique. The critical current value J(c) was derived from these profiles and temperature dependences of J(c) for twinned and untwinned regions were built. Twin boundaries are shown to contribute essentially to pinning at temperatures above 45 K, while at lower temperatures other defects dominate. A model is suggested which explains the exponential character of J(c)(T) obtained for the untwinned region.

引用

页码：81 / 86

页数：6

共 28 条

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