Effect of the soft/hard exchange interaction on natural resonance frequency and electromagnetic wave absorption of the rare earth-iron-boron compounds

Toru Maeda, Satoshi Sugimoto, Toshio Kagotani, Nobuki Tezuka, Koichiro Inomata

Research output: Contribution to journalArticle

174 Citations (Scopus)

Abstract

The effect of exchange interaction between the hard-magnetic Y 2Fe14B and soft-magnetic Fe3B phases on the natural resonance phenomenon and microwave absorption properties was investigated. The Y2Fe14B/Fe3B ribbons were prepared by melt-spinning. The annealing at just above crystallization temperature of the ribbons and the Cu addition were effective to improve the exchange interaction between Y2Fe14B and Fe3B phases. A linear relationship between the recoil ratio and the shift of resonance frequency was confirmed. The Y9.4Fe79.3B 11.1Cu0.2 ribbon, annealed at 1003K, exhibited the largest recoil ratio of 0.49 and its resin composite showed the natural resonance frequency (fr) at 44GHz, which was 23GHz lower than that of the Y2Fe14B resin composite. The Y9.4Fe 79.3B11.1Cu0.2 composite also exhibited good microwave absorption properties (over 99%) at 39.5GHz with the absorber thickness of 0.38mm.

Original languageEnglish
Pages (from-to)195-205
Number of pages11
JournalJournal of Magnetism and Magnetic Materials
Volume281
Issue number2-3
DOIs
Publication statusPublished - 2004 Oct 1

Keywords

  • Exchange interaction
  • Microwave absorber
  • Natural resonance
  • Rare earth iron boron

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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