Abstract
A method has been proposed for computer simulation of thermal fluctuation motion of domain walls in polycrystalline ferromagnetic nanowires with allowance for their interaction with a field of magnetic inhomogeneities. The algorithm includes the stochastic Langevin function and takes into account the term describing the random force relief of the pinning of a domain wall at magnetic inhomogeneities. The proposed algorithm has been used to obtain different statistical characteristics of the process of displacement of the domain walls: distributions of magnetization jumps, activation energies, depinning waiting times, and jump times. It has been shown that the Einstein-Smoluchowski relation is not applicable to the description of thermal fluctuation motion of a particle in a random force relief.
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Original Russian Text © A.A. Ivanov, V.A. Orlov, 2014, published in Fizika Tverdogo Tela, 2014, Vol. 56, No. 12, pp. 2346–2354.
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Ivanov, A.A., Orlov, V.A. On the simulation of the Brownian motion of a domain wall in nanowires. Phys. Solid State 56, 2430–2439 (2014). https://doi.org/10.1134/S1063783414120130
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DOI: https://doi.org/10.1134/S1063783414120130