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Wear properties of perpendicular magnetic recording media

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5 Author(s)
Yamaura, M. ; Teijin Ltd., Hino, Tokyo, Japan ; Yatabe, T. ; Matsuzawa, H. ; Kadokura, S.
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Wear properties of sputtered Co-Cr/permalloy double layer on flexible substrate with and without an inorganic protective top layer were studied under simulated tribological conditions. A soft head slider (ex. glass) gave even severer damage to media than the hard one (ex. Al2O3-TiC), and a 200 Å thin inorganic protective top layer was effective enough to enhance resistance against wear. Read-write experiments were also done with use of the double layer flexible media with the protective top layer (200 Å in thickness) by running them on a specially designed driver unit with an Al2O3.TiC spherical SPT head. An out-put signal loss was no more than 3dB even after 10 million times of the head passes.

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Magnetics, IEEE Transactions on  (Volume:22 ,  Issue: 5 )