High speed switching in magnetic recording media

The theoretical formalism behind the introduction of thermal activation into the micromagnetic approach is reviewed. The theory is introduced via an application to a single spin which shows a rapid increase of coercivity at short timescales of the order of nanoseconds. Interaction effects are shown...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1998-03, Vol.34 (2), p.349-354
Main Authors: Chantrell, R.W., Hannay, J.D., Wongsam, M., Lyberatos, A.
Format: Article
Language:English
Subjects:
Coercive force
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Damping
Energy barrier
Equations
Exact sciences and technology
Magnetic materials
Magnetic properties and materials
Magnetic recording
Magnetic recording materials
Magnetic switching
Magnetization reversal
Micromagnetics
Physics
Pulse measurements
Studies of specific magnetic materials
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Summary:The theoretical formalism behind the introduction of thermal activation into the micromagnetic approach is reviewed. The theory is introduced via an application to a single spin which shows a rapid increase of coercivity at short timescales of the order of nanoseconds. Interaction effects are shown to increase relaxation times. A model of thermally activated spin-waves is presented.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.667761