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Thermally activated magnetization reversal in classical spin chains

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2000

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Usadel, Klaus-Dieter

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http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-92785
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https://doi.org/10.1142/9789812793652_0031
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Structure and Dynamics of Heterogeneous Systems - From Atoms, Molecules and Clusters in Complex Environment to Thin Films and Multilayers. Singapore: World Scientific Publishing Co. Pte. Ltd., 2000, pp. 331-337. ISBN 978-981-02-4251-0. Available under: doi: 10.1142/9789812793652_0031

Zusammenfassung

We investigate the thermally activated magnetization switching in a classical Heisenberg spin chain driven by an external magnetic field. For small system sizes we expect that the magnetic moments rotate coherently, while in the case of larger system sizes the magnetization reversal is proposed to be due to soliton-antisoliton nucleation. We compare Monte Carlo simulations with the direct integration of the Landau-Lifshitz-Gilbert equation of motion with Langevin dynamics as well as with asymptotic solutions for the escape rates following from the Fokker-Planck equation, finding agreement for low temperatures and high damping. We also discuss deviations in the intermediate temperature regime.

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530 Physik

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Structure and Dynamics of Heterogeneous Systems - From Atoms, Molecules and Clusters in Complex Environment to Thin Films and Multilayers, 24. Feb. 1999 - 26. Feb. 1999, Duisburg, Germany
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ISO 690HINZKE, Denise, Ulrich NOWAK, Klaus-Dieter USADEL, 2000. Thermally activated magnetization reversal in classical spin chains. Structure and Dynamics of Heterogeneous Systems - From Atoms, Molecules and Clusters in Complex Environment to Thin Films and Multilayers. Duisburg, Germany, 24. Feb. 1999 - 26. Feb. 1999. In: Structure and Dynamics of Heterogeneous Systems - From Atoms, Molecules and Clusters in Complex Environment to Thin Films and Multilayers. Singapore: World Scientific Publishing Co. Pte. Ltd., 2000, pp. 331-337. ISBN 978-981-02-4251-0. Available under: doi: 10.1142/9789812793652_0031
BibTex
@inproceedings{Hinzke2000Therm-956,
  year={2000},
  doi={10.1142/9789812793652_0031},
  title={Thermally activated magnetization reversal in classical spin chains},
  isbn={978-981-02-4251-0},
  publisher={World Scientific Publishing Co. Pte. Ltd.},
  address={Singapore},
  booktitle={Structure and Dynamics of Heterogeneous Systems - From Atoms, Molecules and Clusters in Complex Environment to Thin Films and Multilayers},
  pages={331--337},
  author={Hinzke, Denise and Nowak, Ulrich and Usadel, Klaus-Dieter}
}
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