Barkhausen avalanches in anisotropic ferromagnets with $180^\circ$ domain walls
Statistical Mechanics
2009-10-31 v2 Disordered Systems and Neural Networks
Abstract
We show that Barkhausen noise in two-dimensional disordered ferromagnets with extended domain walls is characterized by the avalanche size exponent 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 . 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.
Cite
@article{arxiv.cond-mat/9903090,
title = {Barkhausen avalanches in anisotropic ferromagnets with $180^\circ$ domain walls},
author = {Bosiljka Tadic and Ulrich Nowak},
journal= {arXiv preprint arXiv:cond-mat/9903090},
year = {2009}
}
Comments
Changes in the text and references, To appear in Phys. Rev. E