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.
Modeling thermally activated domain wall dynamics in thin magnetic strips with disorder / L. Laurson, A. Mughal, C. Serpico, G. Durin, S. Zapperi. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 292:1(2011), pp. 012008.1-012008.5. ((Intervento presentato al convegno International Conference on Trends in Spintronics and Nanomagnetism (TSN) tenutosi a Lecce nel 2010.
Modeling thermally activated domain wall dynamics in thin magnetic strips with disorder
S. ZapperiUltimo
2011
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.File | Dimensione | Formato | |
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