Magnetization reversals in elliptical permalloy particles

Zung Hang Wei, Mei Feng Lai, Ching Ray Chang, N. A. Usov, J. C. Wu, Jun Yang Lai

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We use the micromagnetic simulation to study the reversible and irreversible magnetization processes of the single-domain elliptical permalloy particles. The magnetization curve of the reversible process, which has no hysteresis, obtained by applying the field along the hard axis of the elliptical particle is almost linear, as is the case in the single-domain ellipsoidal particle. On the other hand, due to the occurrence of the nonuniform reversal, the switching field of the irreversible process, which has hysteresis, is reduced significantly compared to that predicted by the Stoner-Wohlfarth model. The nucleation fields of elliptical particles are calculated as a function of ellipse's aspect ratio, and the function reveals a step-like behavior.

Original languageEnglish
Pages (from-to)2107-2109
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number4 II
Publication statusPublished - 2004 Jul 1

All Science Journal Classification (ASJC) codes

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

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