Control of coercivity in exchange-coupled graded (001) FePt: SiO 2 nanocomposite films

Tom A. George, Yongsheng Yu, Lanping Yue, Ralph Skomski, D. J. Sellmyer

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We fabricated exchange-coupled composite films with perpendicular anisotropy using nanograins of L10 FePt as a magnetically hard base layer and FePt: SiO2 as a relatively soft phase. The degree of anisotropy and nanostructure in the soft layer was controlled by varying the deposition temperature. Growth of the low-anisotropy layer followed the particulate structure of the base layer at deposition temperatures of 390°C or greater. Perpendicular coercivities were strongly dependent on both the anisotropy and thickness of the softer layer.

Original languageEnglish (US)
Article number5467575
Pages (from-to)2435-2437
Number of pages3
JournalIEEE Transactions on Magnetics
Volume46
Issue number6
DOIs
StatePublished - Jun 2010

Keywords

  • Coercivity
  • Exchange-coupled composite
  • FePt
  • Perpendicular recording media

ASJC Scopus subject areas

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

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