Simulation of the Brownian motion of the domain wall in a nonlinear force field of nanowires


Тип публикации: статья из журнала

Год издания: 2015

Идентификатор DOI: 10.1140/epjb/e2014-50334-7

Ключевые слова: Activation energy, Brownian movement, Differential equations, Magnetization, Nanowires, Stochastic systems, Domain-wall propagation, Langevin equation, Langevin functions, Magnetic inhomogeneities, Magnetization jump, Polycrystalline nanowires, Smoluchowski equation, Statistic characteristics, Domain walls

Аннотация: The paper proposes a computer simulation method of the thermo-fluctuational motion of domain walls in ferromagnetic polycrystalline nanowires, taking into account a non-linear force field of magnetic inhomogeneities. The method makes use of stochastic Langevin function. Into the Langevin equation we added a member describing randomПоказать полностьюforce pattern of domain wall fixation on magnetic inhomogeneities. A variety of statistic characteristics of domain wall propagation process have been obtained: magnetization jumps distribution, activation energies distribution, distribution of magnetization switch waiting times and distribution of magnetization jump times. Paper shows that it is incorrect to apply Einstein-Smoluchowski equation for particle's thermo-fluctuational motion in non-linear force field pattern.

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Выпуск журнала: Vol. 88, Is. 2

ISSN журнала: 14346028

Место издания: NEW YORK

Издатель: SPRINGER