Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.855228
