Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.816277
