Journal of the Magnetics Society of Japan
Online ISSN : 1880-4004
Print ISSN : 0285-0192
ISSN-L : 0285-0192
Magneto-Optical Recording
Recording Characteristics of Double-Layered TbFeCo Disk
T. TokunagaK. HashimaY. FujiiK. K. TsutsumiH. Sugahara
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JOURNAL OPEN ACCESS

1988 Volume 12 Issue 2 Pages 211-214

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Abstract
Exchange coupled double-layered TbFeCo films, which consist of a transition-metal dominant 1st layer and a rare-earth dominant 2nd layer, are found to be a high performance medium for an erasable optical memory disk. In this paper, we have studied the dependence of recording characteristics on the magnetic properties of each layer. The temperature dependence of switching fields of each layer was measured by Hall effect, and the change in magnetization process with temperature was discussed. It is suggested that the recording noise of large Hc1 (coercive force of the 1st layer) film at lower write power results from a difference of the magnetization process on recording temperature.
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© 1988 by The Magnetics Society of Japan
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