Systems and methods for providing capping layers for heat assisted magnetic recording media
AssigneeWD Media, LLC
InventorsBincheng Wang, Alexander S. Chernyshov, Hua Yuan, Tomoko Seki, Antony Ajan, B. Ramamurthy Acharya
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Abstract
Aspects of the present invention are directed to heat assisted magnetic recording (HAMR) media with a CoCrPtB based capping layer design that is capable of reducing switching field distribution and boosting signal-to-noise ratio of HAMR media. In one embodiment of the invention, a recording medium for heat assisted magnetic recording (HAMR) includes a substrate, a magnetic recording layer on the substrate, and a capping layer on and directly in contact with the magnetic recording layer. The capping layer includes CoCrPtB.
Claims22
A heat assisted magnetic recording (HAMR) medium comprising:
- a substrate;
- a magnetic recording layer on the substrate;
- and
- a capping layer on and directly in contact with the magnetic recording layer,
- wherein the capping layer comprises CoCrPtB and has a half-crystalline structure formed by a single sputtering process.
A heat assisted magnetic recording (HAMR) medium comprising:
- a substrate;
- a magnetic recording layer on the substrate;
- and
- a capping layer on and directly in contact with the magnetic recording layer,
- wherein the capping layer comprises CoCrPtB, and
- wherein the capping layer comprises Co at about 40 to 80 atomic percent, Cr at about 0 to 35 atomic percent, Pt at about 0 to 30 atomic percent, and B at about 0 to 15 atomic percent.
A method of fabricating a heat assisted magnetic recording (HAMR) medium, the method comprising:
- forming a substrate;
- forming a magnetic recording layer on the substrate;
- and
- forming a capping layer on and directly in contact with the magnetic recording layer,
- wherein the capping layer comprises CoCrPtB and has a half-crystalline structure.
A method of fabricating a heat assisted magnetic recording (HAMR) medium, the method comprising:
- forming a substrate;
- forming a magnetic recording layer on the substrate;
- and
- forming a capping layer on and directly in contact with the magnetic recording layer,
- wherein the capping layer comprises CoCrPtB, and
- wherein the capping layer comprises Co at about 40 to 80 atomic percent, Cr at about 0 to 35 atomic percent, Pt at about 0 to 30 atomic percent, and B at about 0 to 15 atomic percent.
Dependencies are inferred from the claim text.