Magnetization reversal of FePt hard/soft stacked nanocomposite particle assembly

Y. K. Takahashi*, K. Hono, S. Okamoto, O. Kitakami

*この研究の対応する著者

研究成果: Article査読

30 被引用数 (Scopus)

抄録

Microstructure and magnetic properties of interfacially disordered FePt nanoparticles with a diameter of about 10 nm were investigated. Sputter deposition of amorphous Al2 O3 overlayer caused the disordering of L 10 -FePt particles at the interface. The assembly of these partially disordered FePt nanoparticles is equivalent to the composite medium consisting of the exchange coupled soft and hard layers. Coercivity Hc of the interfacially disordered FePt nanoparticles significantly decreased with increasing thickness of the disordered layer. Comparison with theoretical calculations has shown that this reduction of Hc is attributed to the so-called spin flop state during the magnetization reversal. The interfacial disordering method has been demonstrated to be a promising technique for fabricating FePt-based soft/hard stacked composite media.

本文言語English
論文番号074305
ジャーナルJournal of Applied Physics
100
7
DOI
出版ステータスPublished - 2006
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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