A simple Lattice Model for hysteresis loops with exchange bias

Abstract

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.

arXiv comment2 pages, 3 figures

References in corpus (4)

• Hysteresis and hierarchies: dynamics of disorder-driven first-order phase transformations
• Reversal-Field Memory in the Hysteresis of Spin Glasses
• Phase Diagram of a Model for Diluted Magnetic Semiconductors Beyond Mean-Field Approximations
• Metastable Random Field Ising model with exchange enhancement: a simple model for Exchange Bias