Recording characteristics on thin metal evaporated media in a helical-scan tape system with a spin-valve head

Author

Tetsukawa, H. ; Kondo, M. ; Soda, Y. ; Ozue, T. ; Motohashi, K. ; Onodera, S. ; Kawana, T.

Author_Institution

Core Technol. Dev. Center, Sony Corp. Core Technol. & Network Co., Yokohama, Japan

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

1910

Lastpage

1912

Abstract

The recording characteristics of Co-CoO metal evaporated (ME) tapes with a giant magnetoresistive head have been investigated. The reproduced spin-valve head output was 7.6 times that of an anisotropic magnetoresistive head at a recording wavelength of 0.4 μm. We also studied the relation between the carrier-to-media noise (C/N_media) ratio and remanent magnetization (Mr) magnetic layer thickness (t) in the ME tape. The media noise level was reduced with decrease in Mr · t by the increase of the oxygen flow rate, whereas the C/N_media ratio of the tape with a magnetic layer thickness of 33 nm was maximized at around 10 mA. We thus confirmed the feasibility of an areal density of 3.8 Gb/in² in a helical-scan tape drive system.

Keywords

cobalt; cobalt compounds; giant magnetoresistance; magnetic heads; magnetic recording noise; magnetic tapes; remanence; spin valves; 0.4 micron; 33 nm; Co-CoO; Co-CoO metal evaporated tapes; NiFe-CoFe-PtMn; areal density; carrier-to-media noise ratio; giant magnetoresistive head; helical-scan tape system; magnetic layer thickness; media noise level; oxygen flow rate; recording characteristics; recording wavelength; remanent magnetization; spin-valve head; Anisotropic magnetoresistance; Giant magnetoresistance; Magnetic anisotropy; Magnetic heads; Magnetic noise; Magnetic recording; Magnetization; Noise level; Perpendicular magnetic anisotropy; Signal to noise ratio;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.802814

Filename

1042041