Depinning of domain walls with an internal degree of freedom

V. Lecomte, Stewart Barnes, J. P. Eckmann, T. Giamarchi

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Taking into account the coupling between the position of the wall and an internal degree of freedom, namely, its phase φ, we examine, in the rigid-wall approximation, the dynamics of a magnetic domain wall subject to a weak pinning potential. We determine the corresponding force-velocity characteristics, which display several unusual features when compared to the standard depinning behavior. At zero temperature, there exists a bistable regime for low forces, with a logarithmic behavior close to the transition. For weak pinning, there occurs a succession of bistable transitions corresponding to different topological modes of the phase evolution. At finite temperature, the force-velocity characteristics become nonmonotonous. We compare our results to recent experiments on permalloy nanowires.

Original languageEnglish (US)
Article number054413
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number5
DOIs
StatePublished - Aug 21 2009

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Domain walls
domain wall
degrees of freedom
Magnetic domains
Nanowires
Permalloys (trademark)
magnetic domains
Temperature
nanowires
temperature
Experiments
approximation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Depinning of domain walls with an internal degree of freedom. / Lecomte, V.; Barnes, Stewart; Eckmann, J. P.; Giamarchi, T.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 80, No. 5, 054413, 21.08.2009.

Research output: Contribution to journalArticle

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