Effect of spin torque on magnetization switching speed having nonuniform spin distribution

Kazushige Hyodo, Chiharu Mitsumata, Akimasa Sakuma

Research output: Contribution to journalArticle

Abstract

We study the influence of the spin torque, which depends on the space and time derivative of magnetization, on magnetization reversal time in a ferromagnetic fine particle. The spin torque operates to dissipate the angular momentum of the magnetization precession, and the torque increases in a spin vortex structure. We calculate the magnetization reversal time under a DC magnetic field using the Landau-Lifshitz-Gilbert equation containing a spin torque term. We found that the spin torque changes the magnetization switching speed significantly during the reversal process by maintaining a spin vortex in an intermediate state.

Original languageEnglish
Article number6332752
Pages (from-to)3951-3954
Number of pages4
JournalIEEE Transactions on Magnetics
Volume48
Issue number11
DOIs
Publication statusPublished - 2012 Oct 29

Keywords

  • Gilbert damping
  • magnetic particles
  • magnetization reversal
  • spin torque

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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