Perpendicular magnetic recording medium and method for...

Details Perpendicular magnetic recording medium and method for... Perpendicular magnetic recording medium and method for...

G - Physics

11

B

352/31, 204/96.0

G11B 5/62 (2006.01) C23C 14/14 (2006.01) G11B 5/66 (2006.01) G11B 5/85 (2006.01) G11B 5/851 (2006.01)

Patent

CA 1221165

PERPENDICULAR MAGNETIC RECORDING MEDIUM, METHOD FOR PRODUCING THE SAME, AND SPUTTERING DEVICE ABSTRACT OF THE DISCLOSURE A magnetic recording medium conventionally utilizes the in-plane magnetization mode, but recently the perpendicular magnetization mode utilizing the perpendicular anisotropy of an hcp cobalt alloy layer, in which the C axis is oriented perpendicular to the layer surface, has been proposed. The known perpendicular magnetic recording medium is produced by means of RF sputtering and comprises a Permalloy layer, as layer of a low coercive-force material, between the nonmag- netic base and the hcp cobalt alloy layer. The perpendicular anisotropy attained by the present invention in very excel- lent and is superior to that of a perpendicular recording medium having no Permalloy layer because a Co-Ta alloy is used as the layer of a now coercive-force material.

421590

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