Universality classes and crossover scaling of Barkhausen noise in thin films

被引：14

作者：

Laurson, Lasse ^{[1
,2
]}

Durin, Gianfranco ^{[3
,4
]}

Zapperi, Stefano ^{[3
,5
]}

机构：

[1] Aalto Univ, COMP Ctr Excellence, FIN-00076 Espoo, Finland

[2] Aalto Univ, Helsinki Inst Phys, Dept Appl Phys, FIN-00076 Espoo, Finland

[3] ISI Fdn, I-10126 Turin, Italy

[4] Ist Nazl Ric Metrol, I-10135 Turin, Italy

[5] CNR Consiglio Nazl Ric, IENI, I-20125 Milan, Italy

来源：

PHYSICAL REVIEW B | 2014年 / 89卷 / 10期

基金：

欧洲研究理事会; 芬兰科学院;

关键词：

DOMAIN-WALL; STATISTICAL PROPERTIES; CRITICAL-DYNAMICS; BEHAVIOR; TRANSITION; AVALANCHES;

D O I：

10.1103/PhysRevB.89.104402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the dynamics of head-to-head domain walls separating in-plane domains in a disordered ferromagnetic thin film. The competition between the domain-wall surface tension and dipolar interactions induces a crossover between a rough domain-wall phase at short length scales and a large-scale phase where the walls display a zigzag morphology. The two phases are characterized by different critical exponents for Barkhausen avalanche dynamics that are in quantitative agreement with experimental measurements on MnAs thin films.

引用

页数：5

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