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arXiv · 1206.4819

Fast domain wall propagation in uniaxial nanowires with transverse fields

Arseni Goussev·Ross G. Lund·J. M. Robbins·Valeriy Slastikov·Charles Sonnenberg
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Abstract

Under a magnetic field along its axis, domain wall motion in a uniaxial nanowire is much slower than in the fully anisotropic case, typically by several orders of magnitude (the square of the dimensionless Gilbert damping parameter). However, with the addition of a magnetic field transverse to the wire, this behaviour is dramatically reversed; up to a critical field strength, analogous to the Walker breakdown field, domain walls in a uniaxial wire propagate faster than in a fully anisotropic wire (without transverse field). Beyond this critical field strength, precessional motion sets in, and the mean velocity decreases. Our results are based on leading-order analytic calculations of the velocity and critical field as well as numerical solutions of the Landau-Lifshitz-Gilbert equation.

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Arseni Goussev, Ross G. Lund, J. M. Robbins, Valeriy Slastikov, Charles Sonnenberg. 2012-06-21. Fast domain wall propagation in uniaxial nanowires with transverse fields. https://doi.org/10.1103/physrevb.88.024425

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