Fast domain-wall propagation in uniaxial nanowires with transverse fields

Arseni Goussev*, Ross G. Lund, J. M. Robbins, Valeriy Slastikov, Charles Sonnenberg

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

18 Citations (Scopus)

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 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.

Original languageEnglish
Article number024425
Number of pages5
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume88
Issue number2
DOIs
Publication statusPublished - 26 Jul 2013

Keywords

  • FERROMAGNETIC NANOWIRES
  • DYNAMICS
  • MOTION

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