Effect of thermal fluctuation on reversal field of magnetic fine particle with surface anisotropy

Y. Nakatani, N. Hayashi, Y. Uesaka, H. Fukushima, O. Kitakami, Y. Shimada

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

The magnetization reversal of a nanometer size ferromagnetic particle with surface anisotropy is investigated by micromagnetic computer simulation. Two kinds of calculations were performed: calculations with and without thermal fluctuation. In the case without thermal fluctuation a surface anisotropy of several ergs/cm2 was found to increase the magnetization reversal field of the particle by a factor of ten as compared with the case without surface anisotropy. The introduction of surface anisotropy was also found to increase the reversal field, and hence, improve thermal stability.

Original languageEnglish
Pages (from-to)3205-3207
Number of pages3
JournalIEEE Transactions on Magnetics
Volume36
Issue number5 I
DOIs
Publication statusPublished - 2000 Sep 1
Event2000 International Magnetics Conference (INTERMAG 2000) - Toronto, Ont, Canada
Duration: 2000 Apr 92000 Apr 12

Keywords

  • Computer simulation
  • Fine particle
  • Micromagnetics
  • Surface anisotropy

ASJC Scopus subject areas

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

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