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

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

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Abstract

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.
Original languageEnglish
JournalJournal of Physics: Conference Series
Volume292
Issue number1
DOIs
Publication statusPublished - 2011

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