Friday, June 22, 2012

1206.4819 (Arseni Goussev et al.)

Fast domain wall propagation in uniaxial nanowires with transverse
fields
   [PDF]

Arseni Goussev, J. M. Robbins, Valeriy Slastikov
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 uniaxial wires actually propagate faster than in fully anisotropic wires. Our conclusions are based on leading-order analytic calculations of the velocity and critical field as well as numerical solutions of the Landau-Lipschitz-Gilbert equation.
View original: http://arxiv.org/abs/1206.4819

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