A simple Lattice Model for hysteresis loops with exchange bias

Details A simple Lattice Model for hysteresis loops with exchange bias A simple Lattice Model for hysteresis loops with exchange bias

2006-05-12

arxiv.org/abs/cond-mat/0605337v1

JMMM 272-276, 703-704 (2004)

Physics

Condensed Matter

Materials Science

2 pages, 3 figures

Scientific paper

10.1016/j.jmmm.2003.12.1089

A simple lattice model that allows hysteresis loops with exchange bias to be reproduced is presented. The model is based on the metastable Random Field Ising model, driven by an external field, with synchronous local relaxation dynamics. The key ingredient of the model is that a certain fraction $f$ of the exchange constants between neighbouring spins is enhanced to a very large value $J_E$. The model allows the dependence of several properties of the hysteresis loops to be analyzed as a function of different parameters and we have carried out an analysis of the first-order reversal curves.

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