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Titolo:
The effect of Pd buffer layers on magnetic exchange energy of Co/Pd multilayered films for perpendicular magnetic recording
Autore:
Kim, JY; Lee, BK; Park, GS; Uchida, M; Kurosawa, T; Watanabe, S; Ariake, J; Honda, N; Ouchi, K;
Indirizzi:
Akita Res Inst Adv Technol, AIT, Akita 0101623, Japan Akita Res Inst Adv Technol Akita Japan 0101623 AIT, Akita 0101623, Japan Samsung Adv Inst Technol, Analyt Engn Lab, Suwon 449900, South Korea Samsung Adv Inst Technol Suwon South Korea 449900 on 449900, South Korea Samsung Adv Inst Technol, Nano Syst Lab, Suwon 449900, South Korea SamsungAdv Inst Technol Suwon South Korea 449900 on 449900, South Korea
Titolo Testata:
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
fascicolo: 1-3, volume: 235, anno: 2001,
pagine: 53 - 58
SICI:
0304-8853(200110)235:1-3<53:TEOPBL>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Keywords:
multilayered film; physical decoupling effect; magnetic domain isolation parameter;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
2
Recensione:
Indirizzi per estratti:
Indirizzo: Kim, JY Seagate Res, River Pk Commons,Suite 550,2403 Sidney St, Pittsburgh, PA 15203 USA Seagate Res River Pk Commons,Suite 550,2403 Sidney St Pittsburgh PA USA 15203
Citazione:
J.Y. Kim et al., "The effect of Pd buffer layers on magnetic exchange energy of Co/Pd multilayered films for perpendicular magnetic recording", J MAGN MAGN, 235(1-3), 2001, pp. 53-58

Abstract

A Co/Pd multilayered film is one of the promising perpendicular magnetic recording (PMR) media with high magnetic squareness, due to interfacial magnetic anisotropy energy. However, the lack of a magnetic decoupling factor in the Co/Pd film, unlike a compositionally decoupled CoCr based alloy film,possesses large magnetic exchange energy which results in large magnetic domain sizes and high noise source. In this research, we investigate a domain isolation parameter (alpha) to control the magnetic exchange energy and domain sizes in terms of the deposition pressures of a Co/Pd recording multilayer and a Pd buffer layer in a PMR disk. The high pressure in the Pd buffer layer is effective to isolate and reduce the Co/Pd domain sizes with a low alpha value. The observations with a magnetic force microscope (MFM) anda cross sectional transmission electron microscope (TEM) prove that the physically decoupling effect originated from the surface roughness of the Pd buffer layer, plays a major role in creating a fine domain pattern in the CO/Pd multilayer. The dynamic read/write performances of the Co/Pd multilayered disk by a merged giant magneto resistive (GMR) head show that the low alpha value disk with magnetically decoupled grains has a low medium noise level, compared with the high alpha value disk. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/03/20 alle ore 14:04:24