Micromagnetics of long ferromagnetic particles

Author

Seberino, Christian ; Bertram, H. Neal

Author_Institution

Center for Magnetic Recording Res., California Univ., San Diego, La Jolla, CA, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3055

Lastpage

3057

Abstract

A 3D micromagnetic model is used to examine nucleation field dependence on exchange length, particle size and external field angle for long ferromagnetic particles. Reasonable agreement is shown between the model´s predictions and recent experiments on Ni particles. Illustrations of the reversal mode are included which show reversal beginning at the ends and proceeding towards the center of the particle. The amount of discretization necessary for accurate modelling is investigated. For a tape particle with a radius equal to the exchange length, a discretization along the length of the particle is found to be adequate

Keywords

magnetic particles; magnetic tapes; magnetisation reversal; nucleation; 3D micromagnetic model; discretization; exchange length; external field angle; long ferromagnetic particles; magnetic tape recording; nucleation field dependence; particle size; reversal mode; tape particle; Anisotropic magnetoresistance; Computational efficiency; Computational modeling; Convergence; Magnetic recording; Micromagnetics; Nickel; Predictive models; Saturation magnetization; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617842

Filename

617842