Effect of the angle-dependent Gilbert damping constant on the magnetization dynamics induced by a spin polarized current

W. J. Kim, T. D. Lee, K. J. Lee

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We performed macrospin simulations for a spin valve structure to investigate magnetization dynamics induced by spin torque. We took into account angle-dependent variation of the Gilbert damping constant and thermal fluctuation field which is caused by spin pumping. Switching probability of the current induced magnetization switching was little affected by the angle-dependence. It is because the critical current density depends on the Gilbert damping constant at the collinear magnetic configuration, either parallel or antiparallel. However, the precession frequency and the full-width at half-maximum at the frequency were significantly affected. We interpreted the effect of the angle-dependent Gilbert damping on the precession motion by means of an angle average of the enhanced damping constant.

Original languageEnglish
Pages (from-to)3207-3209
Number of pages3
JournalIEEE Transactions on Magnetics
Volume42
Issue number10
DOIs
Publication statusPublished - 2006 Oct

Keywords

  • Gilbert damping
  • Macrospin model
  • Spin pumping
  • Spin transfer torque
  • Thermal fluctuation

ASJC Scopus subject areas

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

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