DocumentCode :
991476
Title :
Studies of the "magnetizing region" of a ring-type recording head
Author :
Fayling, R.E.
Author_Institution :
3M Company, 3M Center, St.Paul, Minnesota
Volume :
18
Issue :
6
fYear :
1982
fDate :
11/1/1982 12:00:00 AM
Firstpage :
1212
Lastpage :
1214
Abstract :
The region within which a recording head changes the magnetization state of adjacent recording media was investigated for a 142 μm gap-length ring-head using a dc-pulse recording technique, with varying head-to-tape spacing up to 965 μm. For longitudinal easy-axis recording media, the ,"magnetizing region" has an approximately circular cross-section, with the radius proportional to current amplitude, and inversely proportional to media coercive force. Signal amplitude, read in contact from different "sublayers", decreased with increased record head-to-tape spacing, and with decreasing angle between the boundary of the magnetizing region and the surface of the recording media. Magnetic spacing material containing γ-Fe2O3particles caused a small increase in the radius of the cross-section of the "magnetizing region", but had little effect on signal amplitude for dc-pulse signals. For isotropic recording media, the configuration of the "magnetizing region" is modified by the combined effect of in-plane and perpendicular head field components.
Keywords :
Magnetic recording/reading heads; Coercive force; Magnetic anisotropy; Magnetic flux; Magnetic heads; Magnetic materials; Magnetic recording; Magnetic separation; Magnetization; Perpendicular magnetic anisotropy; Perpendicular magnetic recording;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1982.1062136
Filename :
1062136
Link To Document :
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