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arXiv · 0705.4463

Dynamics of domain walls in magnetic nanostrips

O. A. Tretiakov·D. Clarke·Gia-Wei Chern·Ya. B. Bazaliy·O. Tchernyshyov
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Abstract

We express dynamics of domain walls in ferromagnetic nanowires in terms of collective coordinates generalizing Thiele'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.

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O. A. Tretiakov, D. Clarke, Gia-Wei Chern, Ya. B. Bazaliy, O. Tchernyshyov. 2008-02-14. Dynamics of domain walls in magnetic nanostrips. https://doi.org/10.1103/physrevlett.100.127204

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