DocumentCode
866144
Title
Signal to noise ratio of thin film disks with various orientation ratios
Author
Mirzamaani, M. ; Re, M. ; Lambert, S.E. ; Praino, A. ; Petersen, T.S. ; Johnson, K.E.
Author_Institution
IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA
Volume
26
Issue
5
fYear
1990
fDate
9/1/1990 12:00:00 AM
Firstpage
2457
Lastpage
2459
Abstract
Thin-film disks with various orientation ratios (OR) ranging from 0.5 to 4.3 were fabricated by sputter deposition of CoPtCr with Cr underlayers onto preheated NiP/Al-Mg disks. The recording characteristics of these disks were investigated using a thin-film head. The isolated pulse signal amplitude-to-media noise ratio (So/N) increased when OR was increased from 0.5 to 1 and then remained relatively constant for OR⩾1. An improvement of about 10 dB in overwrite of the disks with OR>1 was observed
Keywords
magnetic disc storage; magnetic heads; magnetic thin film devices; CoPtCr-NiP-AlMg; isolated pulse signal amplitude-to-media noise ratio; orientation ratios; overwrite; recording characteristics; sputter deposition; thin film disks; thin-film head; Chromium; Disk recording; Magnetic anisotropy; Magnetic heads; Magnetic recording; Perpendicular magnetic anisotropy; Signal to noise ratio; Sputtering; Substrates; Transistors;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.104763
Filename
104763
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