Vortex pinning by competing disorder: Bose-glass to vortex-glass crossover

被引：49

作者：

Oussena, M ^{[1
]}

deGroot, PAJ ^{[1
]}

Deligiannis, K ^{[1
]}

Volkozub, AV ^{[1
]}

Gagnon, R ^{[1
]}

Taillefer, L ^{[1
]}

机构：

[1] MCGILL UNIV,DEPT PHYS,MONTREAL,PQ H3A 2T8,CANADA

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.76.2559

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetization measurements have been used to study the Bose-glass to vortex-glass crossover in YBa2Cu3O7-x, crystals by varying the angle theta between the field and the twin planes. Two critical angles theta(L) and theta(K) are found: For theta < theta(L), vortices lock in to the twin planes; for theta(L) < theta < theta(K), a kinked vortex structure occurs; for theta > theta(K), hysteresis loops reproduce the magnetic response of the untwinned regions where pinning is produced by random point defects. The angles theta(K) and theta(L) depend only on the disorder in the untwinned regions and scale with [Delta M(theta(X))](-0.5), where Delta M(theta(K)) is the hysteresis width for theta > theta(K).

引用

收藏

页码：2559 / 2562

页数：4

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