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High magnetic field sensitivity of TbFeCo layer and Pt/Co multilayers with an ultra-thin RE-rich RE-TM layer

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5 Author(s)
M. Ishida ; Seiko Epson Corp., Nagano, Japan ; T. Katsuyama ; T. Kawase ; S. Nebashi
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We studied the magnetic field sensitivity of double layer disks which were composed of a TbFeCo recording layer with low Tb content and a high-Tc RE-rich DyFeCo ultra-thin layer. The Tb14Fe82Co4/Dy30Fe35 Co35 double layer disk has better magnetic field sensitivity than a TbFeCo single recording layer disk. It was found that the film having such a large magnetization as Tb14Fe82 Co4 can be used for MO materials. Furthermore, we investigated the Pt/Co multilayers as a recording layer with an ultra-thin RE-TM layer. The addition of the ultra-thin RE-rich TbCo layer on the Pt/Co multilayers is effective for improvement of the C/N and the field sensitivity as well as that on the TbFeCo recording layer

Published in:

IEEE Transactions on Magnetics  (Volume:33 ,  Issue: 5 )