Calculation of the switching constant of magnetic recording media

Author

Brown, Stephen J C ; Mallinson, John C. ; Wilton, David T. ; Shute, Hazel A.

Author_Institution

Dept. of Math. & Stat., Univ. of Plymouth, UK

Volume

38

Issue

1

fYear

2002

fDate

1/1/2002 12:00:00 AM

Firstpage

271

Lastpage

278

Abstract

We studied the dynamic switching time in two classes of media by considering two different particle orientation distribution functions. We calculated the switching constant directly from the Landau-Lifshitz-Gilbert equation of motion, which was chosen to simulate the dynamic properties of the media. A strong linear relation between the reciprocal of the switching time and the difference between the applied and anisotropy fields is illustrated. In media for which experimental results are available, the values we obtained here agree within a factor of 2

Keywords

magnetic heads; magnetic particles; magnetic recording; magnetic switching; magnetic tapes; magnetic thin films; magnetisation reversal; Landau-Lifshitz-Gilbert equation of motion; adiabatic switching; assembly of magnetic particles; dynamic switching time; field difference; hard disk media; magnetic recording media; magnetization switching constant; particle orientation distribution functions; recording tape media; single domain particle; strong linear relation; switching time reciprocal; thin film heads; Anisotropic magnetoresistance; Coercive force; Equations; Ferrites; Magnetic anisotropy; Magnetic materials; Magnetic recording; Magnetic switching; Perpendicular magnetic anisotropy; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.990118

Filename

990118