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US 8,945,732 B1Granted
Dual-magnetic layer high anisotropy media with orientation initialization layer
AssigneeWD Media, LLC
InventorsHua Yuan, Alexander Chernyshov, B. Ramamurthy Acharya
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Abstract
A recording medium comprising a magnetic recording layer having an axis of magnetic anisotropy substantially perpendicular to the surface thereof, a soft magnetic underlayer disposed under the magnetic recording layer and physically coupled to the magnetic recording layer through one or more intermediate layers magnetically decoupling the soft magnetic underlayer from the magnetic recording layer, and an orientation initialization layer disposed between the magnetic recording layer and the soft magnetic underlayer.
Claims11
A recording medium comprising:
- a magnetic recording layer having an axis of magnetic anisotropy substantially perpendicular to the surface thereof;
- a soft magnetic underlayer disposed under the magnetic recording layer and physically coupled to the magnetic recording layer through one or more intermediate layers magnetically decoupling the soft magnetic underlayer from the magnetic recording layer, wherein the one or more intermediate layers comprise a heatsink layer and a non-magnetic interlayer disposed between the magnetic recording layer and an orientation initialization layer, wherein the one or more intermediate layers comprise a layer of (002) textured CrRu10B3 disposed over the orientation initialization layer, and a layer of (002) textured MgO disposed over the CrRu10B3 layer;
- and
- the orientation initialization layer disposed between the magnetic recording layer and the soft magnetic underlayer, wherein the orientation initialization layer comprises a single layer of MgO.
1 more element
A recording device comprising:
- a recording head for reading magnetic signals from, and writing magnetic signals to, a recording medium;
- and
- a recording medium configured for perpendicular recording, the recording medium further comprising:
- a magnetic recording layer having an axis of magnetic anisotropy substantially perpendicular to the surface thereof;
- a soft magnetic underlayer disposed under the magnetic recording layer and physically coupled to the magnetic recording layer through one or more intermediate layers magnetically decoupling the soft magnetic underlayer from the magnetic recording layer, wherein the one or more intermediate layers comprise a heatsink layer and a non-magnetic interlayer disposed between the magnetic recording layer and an orientation initialization layer, wherein the one or more intermediate layers comprise a layer of (002) textured CrRu10B3 disposed over the orientation initialization layer, and a layer of (002) textured MgO disposed over the CrRu10B3 layer;
- and
- the orientation initialization layer disposed between the magnetic recording layer and the soft magnetic underlayer, wherein the orientation initialization layer comprises a single layer of MgO.
4 more elements
Dependencies are inferred from the claim text.