Title :
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
fDate :
9/1/1999 12:00:00 AM
Abstract :
Some Co-Cr-Ta-Mo perpendicular magnetic recording disks with different Mo content (CMo) 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 (CMo) of 0 to 35 at% exhibited almost the same output values, however the media noise was decreased with increasing (CMo). The disks with (CMo) 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;
Journal_Title :
Magnetics, IEEE Transactions on
