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Titolo:
Thermal processes and stability of longitudinal magnetic recording media
Autore:
Moser, A; Weller, D;
Indirizzi:
IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA IBM Corp San Jose CA USA 95120 p, Almaden Res Ctr, San Jose, CA 95120 USA
Titolo Testata:
IEEE TRANSACTIONS ON MAGNETICS
fascicolo: 5, volume: 35, anno: 1999,
parte:, 1
pagine: 2808 - 2813
SICI:
0018-9464(199909)35:5<2808:TPASOL>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
DYNAMIC COERCIVITY; DISK MEDIA; DECAY; LIMIT; FIELD; SIZE;
Keywords:
magnetic viscosity; magnetic recording; time-dependent coercivity; superparamagnetism;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Moser, A IBM Corp, Almaden Res Ctr, 650 Harry Rd, San Jose, CA 95120 USA IBM Corp 650 Harry Rd San Jose CA USA 95120 an Jose, CA 95120 USA
Citazione:
A. Moser e D. Weller, "Thermal processes and stability of longitudinal magnetic recording media", IEEE MAGNET, 35(5), 1999, pp. 2808-2813

Abstract

Thermally activated magnetization reversal processes in longitudinal magnetic recording media are the origin of signal decay and time dependence of the coercivity. The former may limit the lifetime of the stored data and thelatter determines the minimal write fields at short pulse widths. Both effects depend on the ratio of the reversal barrier and the thermal energy. Signal decay and time dependent coercivity measurements are combined in this paper to experimentally derive a stability ratio, 1/C, as a function of film thickness, recording density and temperature. The experiments are performed with a contact write/read tester using a merged read/write head in physical contact with the sample. Samples are mounted on a variable temperature stage (300 - 390 K) allowing to vary the stability ratios. The samples are a series of CoPtCr recording media with thicknesses from 5.5 nm to 13.0 nm. In the low density limit (500 fc/mm) the onset of thermal decay is observed near (1/C)(0) approximate to 38.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 09:09:58