DocumentCode :
1004797
Title :
Probe type thin film head for perpendicular magnetic recording
Author :
Shiiki, K. ; Shiroishi, Y. ; Shinagawa, K. ; Kumasaka, N. ; Kudo, M.
Author_Institution :
Hitachi, Ltd., Kokubunji, Tokyo, Japan
Volume :
20
Issue :
5
fYear :
1984
fDate :
9/1/1984 12:00:00 AM
Firstpage :
839
Lastpage :
841
Abstract :
By experimenting with a probe type head, writing mechanism of double layer perpendicular medium, it becomes clear that the perpendicular field H g\\sim Hc\\perp + Hd is required to write enough, where Hc\\perp is the coercive field of the medium, Hd = kπMs ( k\\sim2 ) is the demagnetization field and Ms is the magnetization of the medium. In order to generate a strong perpendicular field, the probe type head structure was designed. Corrosion resistive Fe-Si-Ru complex film, of which saturation is 17 kG and permeability is 2000, is developed as a main pole material. A new fabrication method for the multi-turn coil within a small magnetic path is also developed to achieve this design. The output signal of the probe type head by using a Co-Cr double layer medium is about two times as large as that for Winchester type Mn-Zn ferrite head.
Keywords :
Magnetic recording/reading heads; Corrosion; Demagnetization; Magnetic films; Magnetic heads; Magnetic materials; Magnetization; Permeability; Perpendicular magnetic recording; Probes; Writing;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1984.1063352
Filename :
1063352
Link To Document :
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