This article is cited in 1 paper

Magnetism

On the simulation of the Brownian motion of a domain wall in nanowires

A. A. Ivanov^a, V. A. Orlov<sup>b

a</sup> Siberian Federal University, Krasnoyarsk
^b Krasnoyarsk State Pedagogical University named after V. P. Astaf'ev

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.

Received: 16.06.2014

 English version: Physics of the Solid State, 2014, 56:12, 2430–2439

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