International Business Machines Corporation

National University of Singapore

Koashal Kishor Mani Pandey

Ronald Wayne Nunes

Siegfried Lutz Maurer

Charanjit Singh Bhatia

Nikita Gaur

A magnetic data storage medium includes an ion doped magnetic recording layer having a continuous grading of coercivity or anisotropy. The medium also includes an ion-doped overcoat having an ion density that is at a maximum substantially at the interface with the recording layer and has a continuous grading of ion density between the overcoat and the recording layer. The coercivity is at a minimum substantially at the interface.

Method of fabricating graded media

A magnetic data storage medium comprising: an ion doped magnetic recording layer having a continuous grading of coercivity or anisotropy, wherein the coercivity or anisotropy is at a minimum substantially at one side of the magnetic recording layer, and having substantial portion of maximum coercivity or anisotropy at the other side of the magnetic recording layer. Also, a method of fabricating a magnetic data storage medium is included.

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Singapore, Singapore

Koashal Kishor Mani Pandey