Magnetization reversal in particulate L10 nanostructures

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

Research output: Contribution to journalArticle

8 Citations (Scopus)

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

Fingerprint

Magnetization reversal
particulates
Nanostructures
Coercive force
magnetization
coercivity
matrices
Nanoclusters
nanoclusters
Magnets
Magnetization
Ion exchange
Nanocomposites
nanocomposites
magnets
Defects
defects
Computer simulation
simulation

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Magnetization reversal in particulate L10 nanostructures. / Zhou, J.; Skomski, R.; Sorge, K. D.; Sellmyer, David J.

In: Scripta Materialia, Vol. 53, No. 4, 01.08.2005, p. 453-456.

Research output: Contribution to journalArticle

Zhou, J. ; Skomski, R. ; Sorge, K. D. ; Sellmyer, David J. / Magnetization reversal in particulate L10 nanostructures. In: Scripta Materialia. 2005 ; Vol. 53, No. 4. pp. 453-456.
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