Finite element simulation of discrete media with granular structure

Author

Dittrich, R. ; Schrefl, T. ; Forster, H. ; Suess, D. ; Scholz, W. ; Fidler, J. ; Tsiantos, V.

Author_Institution

Vienna Univ. of Technol., Austria

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

1967

Lastpage

1969

Abstract

Discrete media show great potential for future ultra-high density magnetic recording. A hybrid finite element/boundary element method is used to compare the magnetization reversal process in a perpendicular granular film, patterned media, and a single magnetic island. The results show that the influence of magnetostatic interactions on the switching field is comparable with the spread of the nucleation field due to the dispersion of the magnetic easy axes. For CoCrPt, this value is about 75 kA/m.

Keywords

boundary-elements methods; chromium alloys; cobalt alloys; coercive force; demagnetisation; discontinuous metallic thin films; ferromagnetic materials; finite element analysis; granular structure; magnetic anisotropy; magnetic switching; magnetic thin films; magnetisation reversal; perpendicular magnetic recording; platinum alloys; CoCrPt; CoCrPt film; demagnetization curve; dynamical coercivity; finite element simulation; granular structure discrete media; hybrid finite element/boundary element method; magnetic easy axis dispersion; magnetization reversal process; magnetostatic interactions; micromagnetic simulations; nucleation field spread; patterned granular media; patterned media; perpendicular granular film; single magnetic island; switching field; treecode; ultrahigh density magnetic recording; Boundary conditions; Boundary element methods; Finite element methods; Magnetic films; Magnetic particles; Magnetic recording; Magnetization; Magnetostatics; Micromagnetics; Perpendicular magnetic recording;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.802786

Filename

1042060