Journal of the Magnetics Society of Japan
Online ISSN : 1880-4004
Print ISSN : 0285-0192
ISSN-L : 0285-0192
Magnetic Recording Characteristics
Dependence of Recording and Reproducing Characteristics on Thickness of Co-Cr Layer in Perpendicular Recording
S. YamamotoI. TagawaY. NakamuraS. Iwasaki
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JOURNAL OPEN ACCESS

1988 Volume 12 Issue 2 Pages 147-150

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Abstract
The influence of the thickness of a Co-Cr layer in a Co-Cr/Ni-Fe double layer medium on the recording and reproducing characteristics was investigated by computer simulation. In practice, the perpendicular media with a relatively thin Co-Cr layer, about 0.1 μm in thickness, but which is thicker than the longitudinal media, produce high reproduced voltage at high densities. The reason is that the sharp magnetic field distribution of a single-pole-head is created for a thin Co-Cr layer by enhancing the head-to-medium magnetic coupling. As a result, the large residual magnetization remains in the recording process, and the high resolution of the singlg-pole-head generates high voltage in reproduction, even at high densities.
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© 1988 by The Magnetics Society of Japan
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