High-frequency ferromagnetic resonance in Nd2Fe14B/α-Fe nanocomposite films

H. Kato, M. Ishizone, T. Miyazaki, K. Koyama, H. Nojiri, M. Motokawa, T. Ishizaki

Research output: Contribution to journalConference articlepeer-review

17 Citations (Scopus)

Abstract

Thin-film magnets, composed of nanophase dispersed Nd2Fe14B and α-Fe have been synthesized by rf magnetron sputtering. With increasing α-Fe volume fraction VFe, the saturation magnetization increased linearly, while the coercivity decreased. Ferromagnetic resonance measurements were made by using a high-frequency and high-field ESR apparatus, which exhibited two absorption peaks. A model calculation of the resonance field was made for a simplified hard/soft two-sublattice system to analyze these results. Estimated values of the exchange-coupling constant are in good agreement with those deduced from micro-magnetic analysis of the magnetization curves.

Original languageEnglish
Pages (from-to)2567-2569
Number of pages3
JournalIEEE Transactions on Magnetics
Volume37
Issue number4 I
DOIs
Publication statusPublished - 2001 Jul 1
Event8th Joint Magnetism and Magnetic Materials -International Magnetic Conference- (MMM-Intermag) - San Antonio, TX, United States
Duration: 2001 Jan 72001 Jan 11

Keywords

  • Exchange coupling
  • Ferromagnetic resonance
  • Nanocomposite magnet
  • Thin film

ASJC Scopus subject areas

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

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