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US 2012/0070694 A1Published application
Perpendicular Media with Cr-Doped Fe-Alloy Containing Soft Underlayer (SUL)
AssigneeSeagate Technology LLC
InventorsRaj Nagappan Thangaraj, Mariana Rodica Munteanu, Erol Girt, Michael J. Stirniman, Thomas Patrick Nolan
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Abstract
A perpendicular magnetic recording medium having a substrate, a Cr-doped Fe-alloy-containing underlayer containing about 8 to 18 at % Cr and a perpendicular recording magnetic layer, and a process for improving corrosion resistance of the recording medium and for manufacturing the recording medium are disclosed.
Claims20
A perpendicular magnetic recording medium comprising:
- a substrate;
- a perpendicular magnetic recording layer;
- and
- an underlayer between the substrate and the perpendicular magnetic recording layer, the underlayer comprising Fe and at least about 8 at. percent Cr;
- wherein the underlayer is substantially amorphous and comprises at least one of Zr, Ta, and B.
2 more elements
A perpendicular magnetic recording medium comprising:
- a substrate;
- a perpendicular magnetic recording layer;
- and
- an underlayer between the substrate and the perpendicular recording magnetic layer, the underlayer comprising Fe, Co, and at least about 8 at. percent Cr,
- wherein the underlayer is substantially amorphous and comprises at least one of Zr, Ta, and B.
2 more elements
A method for manufacturing a perpendicular magnetic recording medium, the method comprising:
- depositing an underlayer on a substrate, the underlayer comprising Fe and at least about 8 at. percent Cr, wherein the underlayer is substantially amorphous and comprises at least one of Zr, Ta, and B;
- and
- depositing a perpendicular magnetic recording layer on the underlayer.
Dependencies are inferred from the claim text.