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Temperature dependence of the magnetic properties of L11-type Co–Ni–Pt ordered alloy films for thermally assisted recording media

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6 Author(s)
Sayama, J. ; Central Research Laboratory, Hitachi, Ltd., 2880 Kozu, Odawara, Kanagawa 256-8510, Japan ; Shimatsu, T. ; Nemoto, Hiroaki ; Okamoto, Satoshi
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We developed L11-type Co–Ni–Pt ordered alloy films for use as a material for creating thermally assisted magnetic recording media with high recording densities. We examined the temperature dependence of magnetic properties of L11-type (Co1-xNix)50Pt50 ordered alloy films. These films had a uniaxial magnetic anisotropy of 107 erg/cm3 at an x of less than ∼ 0.8. The Curie point was monotonously reduced when the Ni content steadily increased. The composition of Co15Ni35Pt50 (x = 0.7) provided both a high magnetic anisotropy of 1.4 × 107 erg/cm3 and a low Curie point of 583 K, which are favorable for thermally assisted magnetic recording media.

Published in:

Journal of Applied Physics  (Volume:110 ,  Issue: 1 )

Date of Publication:

Jul 2011

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