Numerical simulations of the effect of record field pulse length on medium coercivity at finite temperatures

Thin film media under consideration for high density recording in the range of 5 Gbit/in/sup 2/ and beyond will utilize extremely small grains in order to achieve acceptable signal-to-noise ratio limits. Numerical simulations of the reversal process including thermal fluctuations are utilized to det...

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Veröffentlicht in:	IEEE transactions on magnetics 1998-07, Vol.34 (4), p.1543-1545
Hauptverfasser:	Bertram, H.N., Qingzhi Peng
Format:	Artikel
Sprache:	eng
Schlagworte:	Anisotropic magnetoresistance Coercive force Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Fluctuations Grain size Magnetic films Magnetic properties and materials Magnetic recording Magnetic recording materials Magnetization Numerical simulation Physics Pulse measurements Signal to noise ratio Studies of specific magnetic materials
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Beschreibung
Zusammenfassung:	Thin film media under consideration for high density recording in the range of 5 Gbit/in/sup 2/ and beyond will utilize extremely small grains in order to achieve acceptable signal-to-noise ratio limits. Numerical simulations of the reversal process including thermal fluctuations are utilized to determine medium coercivity versus field duration. Typically media with grain diameter 10 nm will have a 23% decrease in coercivity over a 1-100 nsec range.
ISSN:	0018-9464 1941-0069
DOI:	10.1109/20.706609