Dynamics of domain walls in magnetic nanostrips

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American Physical Society
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.
collective coordinates, Thiele steady-state, weak external perturbations, soft modes, nanowires, magnetic domain walls, ferromagnetic materials, vortex wall, steady viscous motion, Walker breakdown
Physical Review Letters 28 March 2008, vol.100, no.12, pp. 127204-1-4