Granular perpendicular magnetic recording media with dual recording layer and method of fabricating same
AssigneeSeagate Technology LLC
InventorsZhong Wu, Samuel Harkness, Hans Richter, Alexander Dobin
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Abstract
A granular perpendicular magnetic recording medium comprises a non-magnetic substrate and a granular perpendicular magnetic recording layer overlying the substrate, comprising a first granular perpendicular magnetic layer proximal the substrate and having a first saturation magnetization (Ms)1, and a second granular perpendicular magnetic layer distal the substrate and having a second, different saturation magnetization (Ms)2. Also disclosed is a method of fabricating the granular perpendicular magnetic recording medium.
Claims29
A granular perpendicular magnetic recording medium, comprising:
- (a) a non-magnetic substrate;
- and
- (b) a granular perpendicular magnetic recording layer overlying said substrate, comprising:
- (i) a first granular perpendicular magnetic layer proximal said substrate and having a first saturation magnetization (Ms)1;
- and
- (ii) a second granular perpendicular magnetic layer distal said substrate and having a second, different saturation magnetization (Ms)2.
A method of fabricating a granular perpendicular magnetic recording medium, comprising steps of:
- (a) providing a non-magnetic substrate;
- (b) forming over said substrate a granular perpendicular magnetic recording layer, comprising:
- (i) forming a first granular perpendicular magnetic layer proximal said substrate and having a first saturation magnetization (Ms)1;
- and
- (ii) forming a second granular perpendicular magnetic layer distal said substrate and having a second, different saturation magnetization (Ms)2.
Dependencies are inferred from the claim text.