Western Digital Technologies, Inc.

Hgst Netherlands, B.v.

Sylvia Helena Florez

Bruce David Terris

Hoa Van Do

Yoshihiro Ikeda

Kentaro Takano

Qing Zhu

Mrugesh Desai

Prakash Mani

Cristian Papusoi

Perpendicular magnetic recording media including a carbon grain isolation initiation layer for reducing intergranular exchange coupling in the recording layer are provided. In one such case, the media includes a substrate, a plurality of underlayers on the substrate, a grain isolation initiation layer (GIIL) on the plurality of underlayers, the GIIL including C, a metal, and an oxide, and a magnetic recording layer directly on the GIIL and including a non-ordered structure. In another case, a method of fabricating such magnetic media is provided.

Perpendicular recording media with carbon grain isolation initiation layer

In one general embodiment, a magnetic medium includes a recording layer having at least three exchange control layers each having a magnetic moment less than 100 emu/cc, and four magnetic layers separated from one another by the exchange control layers. An uppermost of the magnetic layers is doped with oxygen. In another general embodiment, a magnetic medium includes a recording layer having at least three exchange control layers and four magnetic layers separated from one another by the exchange control layers. An uppermost of the magnetic layers has an oxygen content of greater than 0.5 vol %. An average pitch of magnetic grains in a lowermost of the magnetic layers is 9 nm or less. A lowermost of the magnetic layers has an oxide content of at least 20 vol %.

Vertically and horizontally weakly coupled perpendicular small grain media

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San Jose, CA, United States of America

Sylvia Helena Florez