Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/10537
Title: | Metastable random-field Ising model with exchange enhancement: A simple model for exchange bias |
Author: | Illa i Tortós, Xavier Vives i Santa-Eulàlia, Eduard Planes Vila, Antoni |
Keywords: | Histèresi Model d'Ising Vidres de spin Hysteresis Ising model Spin glasses |
Issue Date: | 2002 |
Publisher: | The American Physical Society |
Abstract: | We present a simple model that allows hysteresis loops with exchange bias to be reproduced. The model is a modification of the $T=0$ random-field Ising model driven by an external field and with synchronous local relaxation dynamics. The main novelty of the model is that a certain fraction f of the exchange constants between neighboring spins is enhanced to a very large value ${J}_{E}.$ The model allows the dependence of the exchange bias and other properties of the hysteresis loops to be analyzed as a function of the parameters of the model: the fraction f of enhanced bonds, the amount of the enhancement ${J}_{E},$ and the amount of disorder, which is controlled by the width $\ensuremath{\sigma}$ of the Gaussian distribution of the random fields. |
Note: | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.66.224422 |
It is part of: | Physical Review B, 2002, vol. 66, núm. 22, p. 224422-1-224422-7 |
URI: | http://hdl.handle.net/2445/10537 |
Related resource: | http://dx.doi.org/10.1103/PhysRevB.66.224422 |
ISSN: | 0163-1829 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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