High energy products in exchange-coupled nanocomposite films

J. P. Liu, Y. Liu, R. Skomski, D. J. Sellmyer

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Several systems of nanocomposlte thin films have been prepared by plasma sputtering and heat treatment. By choosing suitable multilayer structures of the as-deposited films and subsequent heat-treatment processes, the nanostructures of the films have been tailored. The thermal processing is the key to control the morphology. Appropriate heat-treatment processes have been found for the systems studied, which result in the desired nanostructures. For the first time a nearly ideal nanostructure with the soft-phase grains embedded homogeneously in the hard phase grains has been obtained for the FePt-Fe1-xPtx(x-0.3) system. Effective intergrain exchange coupling has been realized. As a consequence, high energy products up to 50 MGOe have been achieved.

Original languageEnglish (US)
Pages (from-to)3241-3246
Number of pages6
JournalIEEE Transactions on Magnetics
Volume35
Issue number5 PART 2
DOIs
StatePublished - 1999

Keywords

  • Exchange coupling
  • Heat treatment
  • Permanent magnets
  • Thin films

ASJC Scopus subject areas

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

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