Low coupling oxide media (LCOM)
AssigneeSeagate Technology LLC
InventorsErol Girt, Hans Jurgen Richter, Mariana R. Munteanu, Thomas Nolan
Life of this patent
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Abstract
A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.
Claims17
A magnetic recording medium, comprising:
- a first low saturation magnetization magnetic layer between a non-magnetic interlayer and at least one perpendicular magnetic storage layer;
- a second low saturation magnetization magnetic layer between the at least one perpendicular magnetic storage layer and a protective overcoat layer;
- wherein the at least one perpendicular magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the low saturation magnetization magnetic layers have a saturation magnetization below that of the at least one perpendicular magnetic storage layer.
A method of making a magnetic recording medium, comprising:
- depositing a first low saturation magnetization magnetic layer between a non-magnetic interlayer and at least one perpendicular magnetic storage layer;
- depositing a second low saturation magnetization magnetic layer between the at least one perpendicular magnetic storage layer and a protective layer;
- wherein the at least one perpendicular magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the low saturation magnetization magnetic layers have a saturation magnetization below that of the at least one perpendicular magnetic storage layer.
A magnetic recording medium, comprising a perpendicular magnetic storage layer between a first low saturation magnetization magnetic layer and a second low saturation magnetization magnetic layer, wherein the perpendicular magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3, and wherein the first and the second low saturation magnetization magnetic layers have a saturation magnetization below the saturation magnetization of the perpendicular magnetic storage layer.
An apparatus comprising a magnetic layer with perpendicular anisotropy and a saturation magnetization between about 400-900 emu/cm3, wherein the magnetic layer is between a first low saturation magnetization magnetic layer and a second low saturation magnetization magnetic layer, and wherein the first and the second low saturation magnetization magnetic layers have a saturation magnetization below the saturation magnetization of the magnetic layer.
Dependencies are inferred from the claim text.