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arXiv · 0903.0431

Field-induced domain wall propagation velocity in magnetic nanowires

X. R. Wang·P. Yan·J. Lu
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Abstract

A thory of field-induced domain wall (DW) propagation is developed. The theory not only explains why a DW in a defect-free nanowire must propagate at a finite velocity, but also provides a proper definition of DW propagation velocity. This definition, valid for an arbitrary DW structure, allows one to compute the instantaneous DW velocity in a meaningful way even when the DW is not moving as a rigid body. A new velocity-field formula beyond the Walker breakdown field, which is in excellent agreement with both experiments and numerical simulations, is derived.

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X. R. Wang, P. Yan, J. Lu. 2009-03-03. Field-induced domain wall propagation velocity in magnetic nanowires. https://doi.org/10.1209/0295-5075/86/67001

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