Barkhausen avalanches in anisotropic ferromagnets with 180° domain walls

被引：0

作者：

Tadić, Bosiljka ^{[1
]}

Nowak, Ulrich ^{[2
]}

机构：

[1] Jožef Stefan Institute, P.O. Box 3000, Ljubljana,1001, Slovenia

[2] Theoretische Tieftemperaturphysik, Gerhard-Mercator-Universität-Duisburg, Duisburg,D-47048, Germany

来源：

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | 2000年 / 61卷 / 04期

关键词：

Anisotropy - Ferromagnetic materials - Iron compounds - Ferromagnetism - Magnets - Boron compounds - Cobalt compounds;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

We show that Barkhausen noise in two-dimensional disordered ferromagnets with extended domain walls is characterized by the avalanche size exponent τs = 1.54 at low disorder. With increasing disorder the characteristic domain size is reduced relative to the system size due to nucleation of new domains and a dynamic phase transition occurs to the scaling behavior with τs = 1.30. The exponents decrease at finite driving rate. The results agree with recently observed behavior in amorphous Metglas and Fe-Co-B ribbons when the applied anisotropic stress is varied. © 2000 The American Physical Society.

引用

页码：4610 / 4613

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