Magnetization switching in single-domain ferromagnets

M. A. Novotny, M. Kolesik, P. A. Rikvold

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

A model for single-domain uniaxial ferromagnetic particles with high anisotropy, the Ising model, is studied. Recent experimental observations have been made of the probability that the magnetization has not switched, PNOT. Here an approach is described in which it is emphasized that a ferromagnetic particle in an unfavorable field is, in fact, a metastable system, and the switching is accomplished through the nucleation and subsequent growth of localized droplets. Nucleation theory is applied to finite systems to determine the coercivity as a function of particle size and to calculate PNOT. Both of these quantities are modified by different boundary conditions, magnetostatic interactions, and quenched disorder.

Original languageEnglish (US)
Pages (from-to)917-918
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume177-181
Issue numberPART 2
DOIs
StatePublished - Jan 1998
Externally publishedYes

Keywords

  • Ferromagnets - nanoscale
  • Magnetization - reversal
  • Metastable phases
  • Switching fields

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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