INTERFACE DEPINNING, SELF-ORGANIZED CRITICALITY, AND THE BARKHAUSEN EFFECT

被引：159

作者：

URBACH, JS ^{[1
]}

MADISON, RC ^{[1
]}

MARKERT, JT ^{[1
]}

机构：

[1] UNIV TEXAS,DEPT PHYS,AUSTIN,TX 78712

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.75.276

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report measurements of magnetic avalanches in a Fe-Ni-Co alloy. The distribution of avalanche sizes is given by P(A)A-αexp(-A/A0), with α=1.33±0.10. The role of demagnetizing effects in the avalanche statistics is demonstrated. We analyze a simple model of interface growth and find a power law distribution of avalanche sizes over a wide range of parameters when an infinite-range demagnetization field is included. The exponents agree with those found at the critical field in the absence of demagnetization effects. © 1995 The American Physical Society.

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页码：276 / 279

页数：4

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