Numerical switching experiments for perpendicular media

Author

Stehno, M. ; Schrefl, T. ; Dittrich, R. ; Forster, H. ; Fidler, J. ; Uesaka, Y.

Author_Institution

Inst. for Solid State Phys., Vienna Univ. of Technol., Austria

Volume

39

Issue

5

fYear

2003

Firstpage

2297

Lastpage

2299

Abstract

The switching speed of a granular perpendicular recording medium is investigated using finite-element micromagnetic calculations. The switching behavior sensitively depends on the intergrain exchange coupling, the grain-size distribution, and the degree of alignment of easy axes. These effects are investigated using subgrain discretization. In irregular microstructures the switching time decreases considerably with decreasing intergrain exchange.

Keywords

exchange interactions (electron); finite element analysis; grain size; magnetic switching; magnetisation reversal; micromagnetics; perpendicular magnetic anisotropy; perpendicular magnetic recording; easy axes degree of alignment; finite-element micromagnetic calculations; grain-size distribution; granular perpendicular recording medium; intergrain exchange coupling; irregular microstructures; numerical switching; perpendicular media; reversal field; subgrain discretization; switching speed; switching time; Equations; Finite element methods; Histograms; Hysteresis; Magnetic heads; Magnetostatics; Micromagnetics; Microstructure; Perpendicular magnetic recording; Thermal stability;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2003.816277

Filename

1233056