Ferromagnetic resonance frequency of a patterned synthetic antiferromagnet

Yo Chan Kong, Sang Ho Lim, Kyung Jin Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We present a theoretical equation for the ferromagnetic resonance (FMR) frequency of a synthetic antiferromagnet (SAF) patterned into a sub-micrometer scale. As the pattern size decreases, both the FMR frequencies of the acoustic and the optic modes increase due to the increased dipolar coupling between two antiferromagnetically coupled ferromagnets. We verify the validity of the equation by comparing its solutions to the numerical results in the framework of the macrospin model. Using the theoretical equation, we investigate the effects of the geometric and the magnetic parameters of the SAF on the FMR frequencies of two modes.

Original languageEnglish
Pages (from-to)1630-1634
Number of pages5
JournalJournal of the Korean Physical Society
Volume54
Issue number4
DOIs
Publication statusPublished - 2009 Apr

Keywords

  • Ferromagnetic resonance
  • Magnetization dynamics
  • Synthetic antiferromagnet

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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