Micromagnetic simulation on effect of oersted field and hard axis field in spin transfer torque switching

K. Ito, T. Devolder, C. Chappert, M. J. Carey, J. A. Katine

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The effects of the current-induced Oersted field and of a hard axis applied field on spin transfer torque (STT) switching have been investigated by performing LLG micromagnetic simulations including a STT term and Gaussian thermal fluctuations. In parallel to anti-parallel switching at large currents, the C-like micromagnetic configuration induced by the Oersted field plays an important role in STT switching. In anti-parallel to parallel switching at large currents, the Oersted field induces a complicated micromagnetic configuration with several vortices. In both cases, the magnetization deviates considerably from macrospin behaviour. However, a macrospin-like behaviour is restored when a hard axis field is present.

Original languageEnglish
Article numberS10
Pages (from-to)1261-1267
Number of pages7
JournalJournal of Physics D: Applied Physics
Volume40
Issue number5
DOIs
Publication statusPublished - 2007 Mar 7

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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