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Generalized Stoner-Wohlfarth model and the non-langevin magnetism of single-domain particles

  • Condensed Matter
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Abstract

In order to develop a model of magnetic dynamics for quantitative analysis of the temperature dependences of the magnetization of an ensemble of nanoparticles in various regimes of the preliminary cooling of a sample, the phenomenological Stoner-Wohlfarth model is generalized for single-domain particles to the case of a more accurate description of relaxation processes in a magnetic system. Calculations in this model and their detailed analysis exhibit a number of qualitative features, including the asymptotic behavior of magnetization and susceptibility in the high-temperature limit, which is different from the Langevin limit for ideal superparamagnetic particles.

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Authors and Affiliations

  1. Institute of Physics and Technology, Russian Academy of Sciences, Moscow, 117218, Russia

    M. A. Chuev

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  1. M. A. Chuev
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Correspondence to M. A. Chuev.

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Original Russian Text © M.A. Chuev, 2007, published in Pis’ma v Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 85, No. 12, pp. 744–750.

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Chuev, M.A. Generalized Stoner-Wohlfarth model and the non-langevin magnetism of single-domain particles. Jetp Lett. 85, 611–616 (2007). https://doi.org/10.1134/S0021364007120053

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  • DOI: https://doi.org/10.1134/S0021364007120053

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