Fast domain-wall propagation in uniaxial nanowires with transverse fields

Goussev, Arseni, Lund, Ross, Robbins, Jonathan, Slastikov, Valeriy and Sonnenberg, Charles (2013) Fast domain-wall propagation in uniaxial nanowires with transverse fields. Physical Review B, 88 (2). 024425. ISSN 1098-0121

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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 behavior 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 a 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.

Item Type: Article
Subjects: F200 Materials Science
F300 Physics
G100 Mathematics
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
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Depositing User: Arseni Goussev
Date Deposited: 29 Jul 2013 11:01
Last Modified: 13 Oct 2019 00:33

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