Dynamic micromagnetic studies of anisotropy effects in perpendicular write heads

Author

Schabes, Manfred E. ; Schrefl, Thomas ; Suess, Dieter ; Ertl, Otmar

Author_Institution

Hitachi San Jose Res. Center, Hitachi Global Storage Technol., San Jose, CA, USA

Volume

41

Issue

10

fYear

2005

Firstpage

3073

Lastpage

3075

Abstract

Dynamic effects are studied in a perpendicular write head for different magnetic anisotropies by multigrid dynamic micromagnetic simulations. We show that there is an intrinsic time-scale (of order 500-750 ps) of the interacting system of head/data layer/soft underlayer gating the speed of the flux-rise in the media as well as the rate of decay of the write flux. In particular, the turnoff speed of the head depends strongly on the head anisotropy.

Keywords

magnetic flux; magnetic heads; micromagnetics; perpendicular magnetic anisotropy; perpendicular magnetic recording; 500 to 750 ps; anisotropy effect; data layer; dynamic micromagnetic simulation; head anisotropy; magnetic anisotropy; magnetization dynamics; perpendicular write heads; soft under-layer; write flux; Anisotropic magnetoresistance; Coils; Geometry; Magnetic anisotropy; Magnetic flux; Magnetic heads; Magnetic materials; Micromagnetics; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Magnetic anisotropy; magnetization dynamics; micromagnetics; perpendicular write heads;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2005.855228

Filename

1519211