Numerical micromagnetics: prolate spheroids

Author

Fredkin, D.R. ; Koehler, T.R.

Author_Institution

Dept. of Phys., California Univ., La Jolla, CA, USA

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

3473

Lastpage

3475

Abstract

Magnetization patterns during reversal in a ferromagnetic prolate spheroid with a 2:1 aspect ratio were studied by a numerical micromagnetics scheme for a range of material parameters. Some of the results are quite analogous to those observed previously in the authors´ (1988) study of a ferromagnetic sphere. Because of the shape anisotropy of the spheroid, certain switching mechanisms found for the sphere were not seen. However, new states, whose dominant features are most easily interpreted in terms of a complex domain wall structure, are found. The reversal process is governed by these states when they occur, and the process is quite complex

Keywords

ferromagnetism; magnetic domain walls; magnetic properties of fine particles; magnetisation reversal; numerical methods; aspect ratio; domain wall structure; ferromagnetic prolate spheroid; magnetisation patterns; material parameters; numerical micromagnetics scheme; reversal process; shape anisotropy; switching mechanisms; Anisotropic magnetoresistance; Laboratories; Magnetic analysis; Magnetic hysteresis; Magnetic materials; Magnetization reversal; Micromagnetics; Physics; Saturation magnetization; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42339

Filename

42339