PRECISION-MEASUREMENT OF MAGNETIC-RELAXATION IN YBA2CU3O7 - POWER-LAW VERSUS LOGARITHMIC DECAY

被引：30

作者：

BRAWNER, DA ^{[1
]}

ONG, NP ^{[1
]}

WANG, ZZ ^{[1
]}

机构：

[1] CNRS,LAB 2M,F-92220 BAGNEUX,FRANCE

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.47.1156

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using a sensitive, micrometer-sized, scanning Hall probe, we have made precision measurements of the relaxation of the remanent magnetization in single crystal YBa2Cu3O7. The technique allows us to determine how the relaxation rate varies over the face of the crystal. At all temperatures from 4.2 to 74 K, the relaxation is observed to follow a power-law dependence B is similar to (1 + t/tau)-1/sigma instead of logarithmic behavior. We discuss the origin of tau, and compare the relaxation behavior with recent calculations of vortex diffusion.

引用

页码：1156 / 1159

页数：4

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