DocumentCode :
1026032
Title :
High coercivity sputter-deposited maghemite thin-film disk
Author :
Ishii, Osamu ; Yoshimura, Fumikatsu ; Ohara, Shuichi
Author_Institution :
NTT Ibaraki Electrical Communication Laboratories, Tokai, Japan
Volume :
23
Issue :
4
fYear :
1987
fDate :
7/1/1987 12:00:00 AM
Firstpage :
1985
Lastpage :
1994
Abstract :
The fabrication and read-write characteristics of a high-coercivity sputter-deposited maghemite (γ-Fe2O3) thin-film disk medium is discussed. By employing a low sputtering gas pressure, severe internal strain is introduced into the films. This internal strain markedly increases coercivity. Furthermore, the films are composed of fine crystallites (300-400 Å in diameter), which result in extremely low media noise. A high coercivity (1060 Oe) γ- (Fe0.954Co0.02Ti0.02Cu0.015)2O3thin-film disk medium with a thickness of 0.095 μm exhibited superior read-write characteristics (e.g., a 2493 FRPM recording density D50and a 42 dB signal-to-noise ratio). These results show that sputter-deposited maghemite films have a promising potential for use as high-density disk media.
Keywords :
Magnetic disk recording; Capacitive sensors; Coercive force; Crystallization; Disk recording; Magnetic films; Saturation magnetization; Signal to noise ratio; Sputtering; Substrates; X-ray diffraction;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1987.1065185
Filename :
1065185
Link To Document :
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