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Magnetic structure of a spherical cluster of monodomain particles

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Abstract

A numerical model is proposed for simulating the magnetic properties of a system (N-cluster) comprising a finite number N of monodomain particles uniformly distributed over a spherical surface. The calculation algorithm is based on the Monte Carlo method. In the absence of an external magnetic field, the magnetic moment of any spherical N-cluster vanishes due to the formation of vortex structures, with a measure of vorticity offered by the toroid moment Q. The results of model calculations show that the value of Q in N-clusters with 4 < N < 20 amounts to about 80% of the maximum and is virtually independent of N, while exhibiting weak even-odd oscillations.

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Authors and Affiliations

  1. Institute of Continuous Media Mechanics, Ural Division, Russian Academy of Sciences, Perm, 614013, Russia

    P. V. Melenev, V. V. Rusakov & Yu. L. Raikher

Authors
  1. P. V. Melenev
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  2. V. V. Rusakov
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  3. Yu. L. Raikher
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Correspondence to P. V. Melenev.

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Original Russian Text © P.V. Melenev, V.V. Rusakov, Yu.L. Raikher, 2008, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2008, Vol. 34, No. 6, pp. 50–56.

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Melenev, P.V., Rusakov, V.V. & Raikher, Y.L. Magnetic structure of a spherical cluster of monodomain particles. Tech. Phys. Lett. 34, 248–250 (2008). https://doi.org/10.1134/S1063785008030218

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  • DOI: https://doi.org/10.1134/S1063785008030218

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