Magnetic properties and microstructure of the granular films processed by annealing FePt-based multilayers

T. O. Seki, Y. K. Takahashi, K. Hono

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

To explore the possibility of FePt-based soft/hard nanocomposite magnets, granular films were prepared by annealing Pt/Fe, FePt/Fe, and FePt/Fe 3Pt multilayers. Although a high coercivity of 12 kOe was obtained by annealing the Fe3Pt/FePt multilayers, only a small remanence was obtained due to random orientation of L10 FePt grains. By introducing oxygen during the film deposition, a few nanometer oxide particles were observed within the FePt grains and Hc increased at the expense of Mr. A possible way to achieve a higher value of (BH)max is discussed based on the relationship between the microstructure and magnetic properties.

Original languageEnglish
Pages (from-to)3799-3801
Number of pages3
JournalIEEE Transactions on Magnetics
Volume41
Issue number10
DOIs
Publication statusPublished - 2005 Oct
Externally publishedYes

Keywords

  • Coercivity
  • Energy product
  • Exchange coupling
  • Multilayer
  • Nanocomposite magnets

ASJC Scopus subject areas

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

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