1306.5990 (Lasse Laurson et al.)

Universality classes and crossover scaling of Barkhausen noise in thin
films    [PDF]

Lasse Laurson, Gianfranco Durin, Stefano Zapperi

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.

View original: http://arxiv.org/abs/1306.5990