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Modeling thermally activated domain wall dynamics in thin magnetic strips with disorder

By L. Laurson, A. Mughal, C. Serpico, G. Durin and S. Zapperi


We study the effect of disorder and temperature on the field-driven dynamics of a transverse domain wall occurring in thin and narrow magnetic strips made of a soft magnetic material such as permalloy. Motivated by a micromagnetic description of such a domain wall, we construct a model based on two coupled flexible lines enclosing the domain wall transition region, capturing both the finite width and the characteristic V-shape of the wall. Disorder is included via randomly distributed pinning centers interacting with the two lines. We study the field-driven dynamics of the domain wall in disordered strips in a finite temperature, and compare our findings to experimental observations of stochastic domain wall dynamics.publishersversionNon peer reviewe

Year: 2011
DOI identifier: 10.1088/1742-6596
OAI identifier:

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