Magnetometry and recording on very high coercivity cobalt alloy disk media

Author

Coughlin, Tom ; Viswanathan, Nal ; Speliotis, Dennis

Author_Institution

Maxtor Corp., San Jose, CA, USA

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

5034

Lastpage

5036

Abstract

The hysteretic and remanent properties, the in-plane and out-of-plane anisotropy, and the high-density recording characteristics of very high coercivity (1450 Oe nominal) state-of-the-art commercial 95-mm thin-film disks from two different sources were investigated. It was found that these disks had comparable high density signal and noise properties, but different combinations of remanence and anisotropy parameters. It is concluded that disk manufacturers can reduce modulation noise and improve signal-to-noise ratio by controlling the coupling between the grains, the degree of perpendicular anisotropy present, and the susceptibility to recording demagnetization

Keywords

cobalt alloys; coercive force; magnetic anisotropy; magnetic disc storage; magnetic field measurement; remanence; Co alloys; anisotropy; coercivity; high-density recording characteristics; hysteresis; modulation noise; noise properties; recording demagnetization; remanent properties; signal properties; signal-to-noise ratio; susceptibility; thin-film disks; Anisotropic magnetoresistance; Cobalt alloys; Coercive force; Disk recording; Hysteresis; Manufacturing; Perpendicular magnetic recording; Remanence; Signal to noise ratio; Transistors;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278731

Filename

278731