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Co-Pt-TiO2 composite film for perpendicular magnetic recording medium

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3 Author(s)
Ariake, J. ; Akita Res. Inst. of Adv. Technol. (AIT), Japan ; Chiba, T. ; Honda, N.

A new type of oxide composite film was proposed as perpendicular magnetic recording medium. The storage layer is composed of Co-Pt and Ti-oxide. By transmission electron microscopy (TEM) observation, the film exhibited a well isolated fine granular structure with small and uniform Co-Pt grains surrounded by TiO2. More sufficient segregation by TiO2 was realized from the beginning of the layer growth compared with other oxide addition film, resulting in a magnetically weak coupled structure. This film has a relatively large magnetic anisotropy constant (Ku) and saturation magnetization (Ms) of more than 5×106 erg/cm3 and about 800 emu/cm3, respectively. The structure was brought about by a high sputtering gas pressure of Co-Pt-TiO2 film deposition.

Published in:

Magnetics, IEEE Transactions on  (Volume:41 ,  Issue: 10 )

Date of Publication:

Oct. 2005

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