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US 8,709,619 B2Granted
Low-coupling oxide media (LCOM)
AssigneeSeagate Technology LLC
InventorsErol Girt, Hans Jurgen Richter, Mariana R. Munteanu, Thomas Nolan
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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.
Claims18
An apparatus comprising:
- a layered structure comprising:
- a first magnetic storage layer;
- a second magnetic storage layer spaced apart from the first magnetic storage layer by a spacing;
- and
- a low saturation magnetization layer, which comprises at least one of Fe, Co, or Ni, in the spacing between the first magnetic storage layer and the second magnetic storage layer to directly exchange couple the first magnetic storage layer and the second magnetic storage layer, the low saturation magnetization layer having a saturation magnetization level below that of the first and second magnetic storage layers.
2 more elements
An apparatus comprising:
- a layered structure comprising:
- a first magnetic storage layer;
- a second magnetic storage layer spaced apart from the first magnetic storage layer by a spacing;
- and
- a low saturation magnetization layer, which comprises at least one of Fe, Co, or Ni, in the spacing between the first magnetic storage layer and the second magnetic storage layer to produce low and uniform directly exchange coupling between the first magnetic storage layer and the second magnetic storage layer, the low saturation magnetization layer having a saturation magnetization level below that of the first and second magnetic storage layers.
2 more elements
An apparatus comprising:
- a layered structure comprising:
- a first magnetic storage layer;
- a second magnetic storage layer spaced apart from the first magnetic storage layer by a spacing;
- and
- a low saturation magnetization layer, which comprises at least one of Fe, Co, or Ni, in the spacing between the first magnetic storage layer and the second magnetic storage layer to directly exchange couple the first magnetic storage layer and the second magnetic storage layer,
- wherein the first magnetic storage layer and the second magnetic storage layer each has a saturation magnetization level that is substantially higher than that of the low saturation magnetization layer.
3 more elements
Dependencies are inferred from the claim text.