Micromagnetic study of switching speed in perpendicular recording media

Author

Benakli, Mourad ; Torabi, Adam F. ; Mallary, Michael L. ; Zhou, Hong ; Bertram, H. Neal

Author_Institution

Quantum Corp., Shrewsbury, MA, USA

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1564

Lastpage

1566

Abstract

Switching speed in perpendicular recording media has been studied from micromagnetic simulations, by applying a uniform reversal field to an array of magnetic grains. Increasing the damping constant reduces the switching time, but a weak exchange interaction leads to an increase in the switching time. A linear relationship is found between the switching time and the head field rise time for different field strengths, damping constants and weak exchanges. A 20° field angle to the perpendicular direction substantially improves the switching speed

Keywords

digital simulation; exchange interactions (electron); magnetic switching; magnetisation reversal; perpendicular magnetic recording; damping constant; head field rise time; magnetic grain array; micromagnetic simulations; perpendicular recording media; switching speed; switching time; uniform reversal field; weak exchange interaction; Anisotropic magnetoresistance; Coercive force; Damping; Magnetic anisotropy; Magnetic heads; Magnetostatics; Micromagnetics; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Saturation magnetization;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.950901

Filename

950901