Micromagnetic study of microwave-assisted magnetization reversals of exchange-coupled composite nanopillars

Terumitsu Tanaka, Naoyuki Narita, Ayumu Kato, Yukio Nozaki, Yang Ki Hong, Kimihide Matsuyama

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Microwave-assisted magnetization reversals of exchange-coupled composite nanopillars were studied by micromagnetic simulation. Magnetization reversal occurred in one or two frequency regions associated with magnetic resonance arising from the soft magnetic section. Significant reductions in ac field strength and frequency, which are required for magnetization switching, were obtained in cases where there was a large interface exchange constant between the soft and hard sections. It was also found that the large saturation magnetization of the soft magnetic section tends to enhance magnetization switching.

Original languageEnglish
Article number6263300
Pages (from-to)562-566
Number of pages5
JournalIEEE Transactions on Magnetics
Volume49
Issue number1
DOIs
Publication statusPublished - 2013 Jan 4

Keywords

  • Ferromagnetic resonance (FMR)
  • magnetic recording
  • micromagnetic simulation
  • microwave-assisted magnetization reversal (MAMR)

ASJC Scopus subject areas

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

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