Current-driven and field-driven domain walls at nonzero temperature

Current-driven and field-driven domain walls at nonzero temperature

We present a model for the dynamics of current- and field-driven domain-wall lines at nonzero temperature. We compute thermally-averaged drift velocities from the Fokker-Planck equation that describes the nonzero-temperature dynamics of the domain wall. As special limits of this general description,...

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Veröffentlicht in:arXiv.org 2009-03
Hauptverfasser: Lucassen, M E, van Driel, H J, C Morais Smith, Duine, R A
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Domain walls
Fokker-Planck equation
Magnetic fields
Physics - Other Condensed Matter
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van Driel, H J
C Morais Smith
Duine, R A
description We present a model for the dynamics of current- and field-driven domain-wall lines at nonzero temperature. We compute thermally-averaged drift velocities from the Fokker-Planck equation that describes the nonzero-temperature dynamics of the domain wall. As special limits of this general description, we describe rigid domain walls as well as vortex domain walls. In these limits, we determine also depinning times of the domain wall from an extrinsic pinning potential. We compare our theory with previous theoretical and experimental work.
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subjects Domain walls
Fokker-Planck equation
Magnetic fields
Physics - Other Condensed Matter
title Current-driven and field-driven domain walls at nonzero temperature
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