Domain wall motion in magnetic nanowires: an asymptotic approach

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

22 Citations (Scopus)

Abstract

We develop a systematic asymptotic description for domain wall motion in one-dimensional magnetic nanowires under the influence of small applied magnetic fields and currents and small material anisotropy. The magnetization dynamics, as governed by the Landau-Lifshitz-Gilbert equation, is investigated via a perturbation expansion. We compute leading-order behaviour, propagation velocities and first-order corrections of both travelling waves and oscillatory solutions, and find bifurcations between these two types of solutions. This treatment provides a sound mathematical foundation for numerous results in the literature obtained through more ad hoc arguments.

Original languageEnglish
Article number20130308
Number of pages18
JournalProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume469
Issue number2160
Early online date16 Oct 2013
DOIs
Publication statusPublished - 8 Dec 2013

Keywords

  • micromagnetics
  • nanowires
  • domain wall motion
  • PROPAGATION
  • DYNAMICS

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