Dynamics of domain walls in magnetic nanostrips

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Title: Dynamics of domain walls in magnetic nanostrips
Author: Tretiakov, O.A.; Clarke, D.; Chern, G.-W.; Bazaliy, Ya.B.; Tchernyshyov, O.
Abstract: We express the dynamics of domain walls in ferromagnetic nanowires in terms of collective coordinates, generalizing Thiele[psila]s steady-state results. For weak external perturbations the dynamics is dominated by a few soft modes. The general approach is illustrated on the example of a vortex wall relevant to recent experiments with flat nanowires. A two-mode approximation gives a quantitatively accurate description of both the steady viscous motion of the wall in weak magnetic fields and its oscillatory behavior in moderately high fields above the Walker breakdown.
URI: http://jhir.library.jhu.edu/handle/1774.2/33765
Date: 2008-03-28
Citation: Physical Review Letters 28 March 2008, vol.100, no.12, pp. 127204-1-4
Subject: collective coordinates
Thiele steady-state
weak external perturbations
soft modes
nanowires
magnetic domain walls
ferromagnetic materials
vortex wall
steady viscous motion
Walker breakdown

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