DocumentCode
1447728
Title
Thermal stability of longitudinal media for >20 Gbits/in2 recording
Author
Abarra, E. Noel ; Sato, Hisateru ; Suzuki, Masaya ; Okamoto, Iwao
Author_Institution
Fujitsu Labs. Ltd., Kanagawa, Japan
Volume
36
Issue
5
fYear
2000
fDate
9/1/2000 12:00:00 AM
Firstpage
2450
Lastpage
2455
Abstract
The thermal stability of a CoCrPtB-based media for over 20 Gbit/in 2 recording is investigated by magnetometry and spin stand methods. Recent quaternary and 5-element alloys for longitudinal magnetic recording media show significantly reduced grain sizes compared to Co-Cr-Pt-Ta alloys for the same underlayer structure. Cr segregation was also enhanced and the Cr-rich regions between grains were wider than those of CoCrPtTa media. These resulted in significant gains in So /Nm necessary for high density and high data rate recording and also in the degradation of magnetic thermal stability. Although higher densities can be achieved by decreasing the bit aspect ratio, side erasure problems due to flux leakage from narrow write heads are worsened
Keywords
boron alloys; chromium alloys; cobalt alloys; grain size; magnetic recording; platinum alloys; segregation; thermal stability; CoCrPtB; areal density; bit aspect ratio; grain size; longitudinal magnetic recording medium; magnetometry; overwrite; segregation; side erasure; spin stand; thermal stability; Chromium; Fabrication; Grain size; Magnetic flux leakage; Magnetic heads; Magnetic recording; Noise reduction; Signal to noise ratio; Thermal degradation; Thermal stability;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.908463
Filename
908463
Link To Document