EXPERIMENTAL-EVIDENCE OF A CROSSOVER IN THE PINNING OF VORTICES IN UNTWINNED SINGLE-CRYSTALS OF YBA2CU3O7-DELTA

被引：18

作者：

DANNA, G ^{[1
]}

BENOIT, W ^{[1
]}

SADOWSKI, W ^{[1
]}

WALKER, E ^{[1
]}

机构：

[1] UNIV GENEVA,DPMC,CH-1211 GENEVA 4,SWITZERLAND

来源：

EUROPHYSICS LETTERS | 1992年 / 20卷 / 02期

关键词：

D O I：

10.1209/0295-5075/20/2/013

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a forced torsion pendulum we have investigated the frequency, amplitude and orientation dependence of the vortex response in untwinned single crystals of YBa2Cu3O7-delta. A new thermally activated dissipation peak which appears at high amplitude, accompanied by a crossover in the pinning, has been observed in addition to the one associated to the controversial vortex melting. The shape and mass anisotropy effects have been investigated.

引用

页码：167 / 173

页数：7

共 18 条

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