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Three-dimensional simulation of irregular dynamics of topological solitons in moving magnetic domain walls

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Abstract

A three-dimensional computer simulation of dynamic processes occurring in a domain wall moving in a soft-magnetic uniaxial film with in-plane anisotropy has been performed based on the micromagnetic approach. It has been shown that the domain wall motion is accompanied by topological transformations of the magnetization distribution, or, more specifically, by “fast” processes associated with the creation and annihilation of vortices, antivortices, and singular (Bloch) points. The method used for visualizing the topological structure of magnetization distributions is based on the numerical determination of topological charges of two types by means of the integration over the contours and surfaces with variable geometry. The obtained data indicate that the choice of the initial configuration predetermines the dynamic scenario of topological transformations.

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Authors and Affiliations

  1. Ural Federal University named after the First President of Russia B. N. Yeltsin, ul. Mira 19, Yekaterinburg, 620002, Russia

    V. V. Zverev & B. N. Filippov

  2. Institute of Metal Physics, Ural Branch of the Russian Academy of Sciences, ul. Sofii Kovalevskoi 18, Yekaterinburg, 620219, Russia

    B. N. Filippov

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  1. V. V. Zverev
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  2. B. N. Filippov
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Correspondence to V. V. Zverev.

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Original Russian Text © V.V. Zverev, B.N. Filippov, 2016, published in Fizika Tverdogo Tela, 2016, Vol. 58, No. 2, pp. 473–484.

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Zverev, V.V., Filippov, B.N. Three-dimensional simulation of irregular dynamics of topological solitons in moving magnetic domain walls. Phys. Solid State 58, 485–496 (2016). https://doi.org/10.1134/S1063783416030318

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