DocumentCode :
1012953
Title :
Head saturation effects in perpendicular and longitudinal recording
Author :
Kugiya, F. ; Koizumi, M. ; Kanno, F. ; Uesaka, Y. ; Okuwaki, T. ; Tamura, T. ; Speliotis, D.E.
Author_Institution :
Central Research Laboratories, Hitachi, Limited., Kokubunji, Tokyo, Japan.
Volume :
21
Issue :
5
fYear :
1985
fDate :
9/1/1985 12:00:00 AM
Firstpage :
1411
Lastpage :
1413
Abstract :
In this study we have investigated the effect of saturation of a narrow gap ring-type-head on the amplitudes and gradients of the horizontal and vertical head field components for both longitudinal and perpendicular magnetic recording systems. The head field calculations were performed by finite element analysis simulating the geometry of a narrow gap ferrite ring head. We found a remarkable difference between the behavior of the horizontal gradient of the longitudinal field component ( \\partial Hx/\\partial x ) and vertical head field component ( \\partial Hy/\\partial x ) as the head core is driven into saturation. From computational results of head field and experimental results of the signal output versus write current response, we found that a) we have to consider recording demagnetization and its dependency on \\partial Hy/\\partial x in "quasi-perpendicular" recording systems, i.e., ring-type head with Co-Cr media, as well as longitudinal recording systems, and b) we have to choose the high Hc medium in the range where the head can achieve saturation recording to reduce the influence of record demagnetization and the dependence of signal output on write current.
Keywords :
Magnetic recording/reading heads; Perpendicular magnetic recording; Analytical models; Demagnetization; Ferrites; Finite element methods; Geometry; Magnetic analysis; Magnetic heads; Performance analysis; Perpendicular magnetic recording; Solid modeling;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1985.1064045
Filename :
1064045
Link To Document :
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