Magnetic properties and recording characteristics of Co-Cr-Ta-Mo perpendicular recording media

Author

Kuga, Kiyoshi ; Yonesa, Y. ; Numazawa, Junji ; Naoe, Masahiko

Author_Institution

NHK Sci. & Tech. Res. Labs., Tokyo, Japan

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

2745

Lastpage

2747

Abstract

Some Co-Cr-Ta-Mo perpendicular magnetic recording disks with different Mo content (C_Mo) ranging from 13 to 5.1 at.% were fabricated by ion beam sputtering prepared. Magnetic properties, crystal structure and recording characteristics of those media were investigated. The disks with (C_Mo) of 0 to 35 at% exhibited almost the same output values, however the media noise was decreased with increasing (C_Mo). The disks with (C_Mo) of 35 at.% exhibited the highest S/N, of which value 3.2 dB higher S/N, than that of the disks without Mo at a wavelength of 0.34 μm

Keywords

chromium alloys; cobalt alloys; magnetic disc storage; magnetic recording noise; molybdenum alloys; perpendicular magnetic recording; sputtered coatings; tantalum alloys; Co-Cr-Ta-Mo; Co-Cr-Ta-Mo perpendicular recording disk; additive element; crystal structure; ion beam sputtering; magnetic properties; signal/noise ratio; Argon; CD recording; Chromium; Disk recording; Ion beams; Magnetic films; Magnetic noise; Magnetic properties; Perpendicular magnetic recording; Sputtering;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800972

Filename

800972