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Simulations of the Domain State Model

Published online by Cambridge University Press:  10 February 2011

U. Nowak ,
A. Misra  and
K. D. Usadel
U. Nowak
Affiliation:
Theoretische Physik, Gerhard-Mercator-Universität Duisburg, 47048 Duisburg, Germany
A. Misra
Affiliation:
Dept. of Physics and MINT Center, University of Alabama, Box 870209, AL 35487, USA
K. D. Usadel
Affiliation:
Theoretische Physik, Gerhard-Mercator-Universität Duisburg, 47048 Duisburg, Germany
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Abstract

The domain state model for exchange bias consists of a ferromagnetic layer exchange coupled to an antiferromagnetic layer. In order to model a certain degree of disorder within the bulk of the antiferromagnet, the latter is diluted throughout its volume. Extensive Monte Carlo simulations of the model were performed in the past. Exchange bias is observed as a result of a domain state in the antiferromagnetic layer which develops during the initial field cooling, carrying a remanent domains state magnetization which is partly irreversible during hysteresis. A variety of typical effects associated with exchange bias like, e. g., its dependence on dilution, positive bias, temperature and time dependences as well as the dependence on the thickness of the antiferromagnetic layer can be explained within this model.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 746: Symposia Q/R – Magnetoelectronics-Novel Magnetic Phenomena in Nanostructures – Advanced Characterization of Artificially Structured Magnetic Materials , 2002 , Q7.4
Copyright
Copyright © Materials Research Society 2003

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References

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