Gilbert Damping in Noncollinear Ferromagnets

Zhe Yuan, Kjetil M.D. Hals, Yi Liu, Anton A. Starikov, Arne Brataas, Paul J. Kelly

Research output: Contribution to journalArticleAcademicpeer-review

25 Citations (Scopus)
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Abstract

The precession and damping of a collinear magnetization displaced from its equilibrium are well described by the Landau-Lifshitz-Gilbert equation. The theoretical and experimental complexity of noncollinear magnetizations is such that it is not known how the damping is modified by the noncollinearity. We use first-principles scattering theory to investigate transverse domain walls (DWs) of the important ferromagnetic alloy Ni 80 Fe 20 and show that the damping depends not only on the magnetization texture but also on the specific dynamic modes of Bloch and Néel DWs in ways that were not theoretically predicted. Even in the highly disordered Ni 80 Fe 20 alloy, the damping is found to be remarkably nonlocal
Original languageEnglish
Article number266603
Number of pages5
JournalPhysical review letters
Volume113
Issue number26
DOIs
Publication statusPublished - 2014

Keywords

  • METIS-307404
  • IR-95025

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