DocumentCode
951933
Title
Magnetic film thickness effects on the recording performance of perpendicular media
Author
Jianping Chen ; Richter, Hans Jürgen ; Chen, Jianping ; Chang, Chunghee ; Ranjan, Rajiv ; Lee, Jean L.
Author_Institution
Seagate Technol. LLC, Fremont, CA, USA
Volume
40
Issue
2
fYear
2004
fDate
3/1/2004 12:00:00 AM
Firstpage
489
Lastpage
491
Abstract
This paper reports on a systematic study of the effect of magnetic film thickness on the recording performance of perpendicular double-layered media. We found that the signal-to-noise ratio of the media decreases with increasing film thickness. This is mainly caused by the poorer head field gradient that results from the increased gap between the pole surface of the head and the top of the soft underlayer of the media. A theoretical study confirms the experimental findings.
Keywords
magnetic recording; magnetic thin films; head field gradient; magnetic film thickness effects; perpendicular media; recording performance; signal-to-noise ratio; Coercive force; Magnetic films; Magnetic heads; Magnetic hysteresis; Perpendicular magnetic recording; Saturation magnetization; Signal to noise ratio; Soft magnetic materials; Testing; Writing;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.2004.824104
Filename
1284451
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