Seagate Technology Incorporated

Chunghee Chang

Mark B Johnson

Charles Changging Chen

Weilu Hang Xu

Abebe Hailu

Shoutao Wang

Xiaoguang Ma

Thomas P Nolan

Qixu David Chen

Erol Girt

Li-Lien Lee

An apparatus and method are provided for improving perpendicular magnetic recording media. The present invention provides media, and a method of fabricating media in a cost-effective manner, with a reduced ruthenium (Ru) content interlayer structure, while meeting media performance requirements. A perpendicular magnetic recording medium is provided comprising a non-magnetic substrate having a surface, and a layer stack situated on the substrate surface. The layer stack comprises, in overlying sequence from the substrate surface a magnetically soft underlayer; an amorphous or crystalline, non-magnetic seed layer; an interlayer structure for crystallographically orienting a layer of a perpendicular magnetic recording material situated on the underlayer; and at least one crystallographically oriented, magnetically hard, perpendicular magnetic recording layer situated on the interlayer structure. The interlayer structure is a stacked structure comprising, in overlying sequence: a chromium alloy situated on the seed layer; and an upper interlayer situated on the chromium alloy.

Seed layer comprising FCC structure

Granular perpendicular media interlayer for a storage device

A perpendicular magnetic recording medium including an interlayer structure for crystallographically orienting a layer of a hexagonal close-packed (hcp) perpendicular magnetic recording material formed thereon, comprising in overlying sequence from a surface of a magnetically soft underlayer:

Highly oriented perpendicular magnetic recording media

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Fremont, CA, United States of America

Chunghee Chang