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Nanostructured Magnetic Materials and Their Applications pp 164–182Cite as

Dynamics of Magnetization Reversal in Models of Magnetic Nanoparticles and Ultrathin Films

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Part of the book series: Lecture Notes in Physics ((LNP,volume 593))

Abstract

We discuss numerical and theoretical results for models of magnetization switching in nanoparticles and ultrathin films. The models and computational methods include kinetic Ising and classical Heisenberg models of highly anisotropic magnets which are simulated by dynamic Monte Carlo methods, and micromagnetics models of continuum-spin systems that are studied by finite-temperature Langevin simulations. The theoretical analysis builds on the fact that a magnetic particle or film that is magnetized in a direction antiparallel to the applied field is in a metastable state. Nucleation theory is therefore used to analyze magnetization reversal as the decay of this metastable phase to equilibrium. We present numerical results on magnetization reversal in models of nanoparticles and films, and on hysteresis in magnets driven by oscillating external fields.

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Author information

Authors and Affiliations

  1. Center for Materials Research and Technology and Department of Physics, Florida State University, Tallahassee, FL, 32306-4351, USA

    Per Arne Rikvold & Steven J. Mitchell

  2. School of Computational Science and Information Technology, Florida State University, Tallahassee, FL, 32306-4120, USA

    Per Arne Rikvold, Gregory Brown & Steven J. Mitchell

  3. Center for Computational Sciences, Oak Ridge National Laboratory, P.O. Box2008, Mail Stop 6114, Oak Ridge, TN, 37831-6114, USA

    Gregory Brown

  4. Department of Physics and Astronomy, Mississippi State University, Mississippi State, MS, 39762, USA

    M. A. Novotny

Authors
  1. Per Arne Rikvold
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  2. Gregory Brown
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  3. Steven J. Mitchell
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  4. M. A. Novotny
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Editor information

Editors and Affiliations

  1. Dept. of Materials Science and Engineering, University of Cincinnati, Cincinnati, OH, 45221-0012, USA

    Donglu Shi

  2. Department of Physics, Gebze Institute of Technology, P.O. 141, 41400, Gebze, Kocaeli, Turkey

    Bekir Aktaş  & Faik Mikailov  & 

  3. Seagate Technology, Bloomington, Minnesota, 55378, USA

    Ladislav Pust

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© 2002 Springer-Verlag Berlin Heidelberg

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Rikvold, P.A., Brown, G., Mitchell, S.J., Novotny, M.A. (2002). Dynamics of Magnetization Reversal in Models of Magnetic Nanoparticles and Ultrathin Films. In: Shi, D., Aktaş, B., Pust, L., Mikailov, F. (eds) Nanostructured Magnetic Materials and Their Applications. Lecture Notes in Physics, vol 593. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-36872-8_10

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  • DOI: https://doi.org/10.1007/3-540-36872-8_10

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