Dynamics of domain walls in magnetic nanostrips

Details Dynamics of domain walls in magnetic nanostrips Dynamics of domain walls in magnetic nanostrips

2007-05-31

arxiv.org/abs/0705.4463v3

Phys. Rev. Lett. 100, 127204 (2008)

Physics

Condensed Matter

Materials Science

4 pages, update to published version

Scientific paper

10.1103/PhysRevLett.100.127204

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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