Anisotropic vortex plasticity in the liquid state of YBa2Cu3O7:: Evidence for quenched c-axis vortex correlation length

被引：35

作者：

Puig, T ^{[1
]}

Obradors, X ^{[1
]}

机构：

[1] UAB, CSIC, Inst Ciencia Mat Barcelona, Bellaterra 08193, Spain

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.84.1571

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A generalized methodology, based on anisotropic angular dependent magnetoresistance measurements, is presented to deconvolute the contributions to the vortex activation energy (i.e., plastic and pinning energies) in the vortex liquid state of high temperature superconductors. Experimental evidence is given for the appearance of a partially entangled liquid vortex state in YBa2Cu3O7 when random quenched and correlated disorders compete, as in twinned melt textured YBa2Cu3O7 quasisingle crystals with Y2BaCuO5 precipitates. The hallmark of this new phase is a quench of the c-axis vortex correlation length.

引用

页码：1571 / 1574

页数：4

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