Magnetic media with high Cr content, non-magnetic CoCrPt intermediate layers
AssigneeSeagate Technology LLC
InventorsQixu Chen, Shanghsien Rou, Samuel D. Harkness, IV, Rajiv Yadav Ranjan
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Abstract
A magnetic recording medium comprises, in overlying sequence from a surface of a non-magnetic substrate: at least one Cr-containing or B2-structured underlayer; a substantially non-magnetic CoCrPt alloy intermediate layer; and at least one CoCrPtB ferromagnetic alloy recording layer; wherein the intermediate layer of substantially non-magnetic CoCrPt alloy has a composition which facilitates Co (11.0) or (10.0) crystallographic orientation of the at least one CoCrPtB ferromagnetic alloy recording layer.
Claims19
A magnetic recording medium, comprising in overlying sequence from a surface of a non-magnetic substrate:
- at least one Cr-containing or B2-structured underlayer;
- a non-magnetic CoCrPt alloy intermediate layer containing from about 4 to about 15 at. % Pt;
- and
- at least one CoCrPtB ferromagnetic alloy recording layer;
- wherein said intermediate layer of non-magnetic CoCrPt alloy has a composition which facilitates Co (11.0) or (10.0) crystallographic orientation of said at least one CoCrPtB ferromagnetic alloy recording layer.
A method of manufacturing a magnetic recording medium, which method comprises the sequential steps of:
- (a) providing a non-magnetic substrate having a surface;
- (b) forming at least one Cr-containing or B2-structured underlayer on said substrate surface;
- (c) forming a non-magnetic CoCrPt alloy intermediate layer containing from about 4 to about 15 at. % Pt over said at least one Cr-containing or B2-structured underlayer;
- and
- (d) forming at least one CoCrPtB ferromagnetic alloy recording layer over said non-magnetic CoCrPt alloy intermediate layer;
- wherein step (c) comprises forming said intermediate layer of non-magnetic CoCrPt alloy with a composition which facilitates Co (11.0) or (10.0) crystallographic orientation of said at least one CoCrPtB ferromagnetic alloy recording layer.
A magnetic recording medium, comprising:
- at least one Cr-based or B2-structured underlayer and at least one CoCrPtB ferromagnetic recording layer containing at least about 5 at. % each of Pt and B;
- and
- means comprising a CoCrPt non-magnetic intermediate layer containing from about 4 to about 15 at. % Pt for facilitating Co (11.0) or (10.0) crystallographic orientation of said at least one CoCrPtB ferromagnetic alloy recording layer.
Dependencies are inferred from the claim text.