Energy barrier enhanced by higher order magnetic anisotropy terms

Osamu Kitakami, Satoshi Okamoto, Nobuaki Kikuchi, Yutaka Shimada

Research output: Contribution to journalLetterpeer-review

18 Citations (Scopus)

Abstract

We have studied the effects of higher order magnetic anisotropy terms on the irreversible switching field, the energy barrier, and the dynamics of magnetization switching of an uniaxial fine particle. The higher order terms effectively enhance the energy barrier without notable change in the switching field, enabling us to attain both saturation recording and good thermal stability. It is found that dynamics of the magnetization vector slightly slows down due to the presence of the higher order terms, but the effect is very small when they are not so large with respect to the lowest order anistropy term.

Original languageEnglish
Pages (from-to)L455-L457
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume42
Issue number5 A
Publication statusPublished - 2003 May 1

Keywords

  • Energy barrier
  • Magnetic anisotropy
  • Magnetization dynamics
  • Saturation recording
  • Switching field
  • Thermal stability

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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