Magnetization reversal in particulate L10 nanostructures

J. Zhou, R. Skomski, K. D. Sorge, D. J. Sellmyer

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Magnetization processes in particulate L10 FePt nanostructures are investigated by model calculations and numerical simulations. The systems considered include anisotropic nanograins embedded in non-magnetic matrix; randomly oriented nanoclusters embedded in a C matrix, and nanocomposites of FePt particles in a semi-hard matrix. The reversal mechanisms depend on both intra- and intergranular features. Quasi-coherent rotation dominates the reversal in weakly-coupled granular magnets, but interface imperfections yield a disproportionately strong coercivity reduction. Strong intergranular exchange leads to a transition to a discrete pinning regime, which is accompanied by a coercivity maximum.

Original languageEnglish (US)
Pages (from-to)453-456
Number of pages4
JournalScripta Materialia
Volume53
Issue number4
DOIs
StatePublished - Aug 1 2005

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Keywords

  • Discrete pinning
  • Exchange interaction
  • L1 magnets
  • Magnetization reversal

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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