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US 2003/0214741 A1Published application
Perpendicular magnetic recording media with an amorphous underlayer
AssigneeImation Corp.
InventorJoseph H. Sexton
Life of this patent
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Abstract
Perpendicular magnetic media are described for use in magnetic recording and data storage. For example, a magnetic medium may include a substrate, an amorphous underlayer formed over the substrate, a seed layer formed over the amorphous underlayer, and a multi-layered magnetic stack formed over the seed layer. In this manner, high perpendicular magnetic anisotropy can be achieved and storage densities can be increased.
Claims27
A magnetic recording medium comprising:
- a substrate;
- an amorphous underlayer formed over the substrate;
- a seed layer including platinum formed over the amorphous underlayer;
- and
- a multi-layered magnetic stack formed over the seed layer, wherein the multi-layered magnetic stack includes layers including platinum and layers including cobalt stacked in an alternating arrangement, wherein each of the layers of the multi-layered magnetic stack defines a thickness of less than or equal to approximately 3 nanometers.
2 more elements
A magnetic medium comprising:
- a substrate;
- an amorphous underlayer formed over the substrate, wherein the amorphous underlayer includes carbon and defines a thickness between approximately 0.1 and 10 nanometers;
- a seed layer formed over the amorphous underlayer;
- and
- a multi-layered magnetic stack formed over the seed layer, wherein the multi-layered magnetic stack includes alternating layers of different materials, wherein each layer of the multi-layered magnetic stack defines a thickness of less than or equal to approximately 3 nanometers, and wherein the medium exhibits a coercivity greater than approximately 4500 Oersteds.
2 more elements
A magnetic medium comprising:
- a substrate;
- an amorphous underlayer formed over the substrate, wherein the amorphous underlayer includes carbon and defines a thickness less than approximately 100 nanometers;
- a layer including platinum formed over the amorphous underlayer, wherein the layer including platinum consists essentially of face centered cubic (FCC) crystallites in a (111) orientation and forms a seed layer;
- and
- a multi-layered magnetic stack formed over the layer including platinum, wherein the multi-layered magnetic stack includes layers including platinum and layers including cobalt stacked in an alternating arrangement, wherein the layers of the multi-layered magnetic stack consist essentially of face centered cubic (FCC) crystallites in a (111) orientation.
2 more elements
A magnetic storage device comprising:
- a magnetic storage medium;
- a head to detect magnetic domains on the medium;
- a controller that controls a position of the head relative to the medium;
- and
- a signal processor that interprets detected magnetic domains,
- wherein the magnetic storage medium includes a substrate, an amorphous underlayer formed over the substrate, a seed layer of platinum formed over the amorphous underlayer, and a multi-layered magnetic stack formed over the seed layer, wherein the multi-layered magnetic stack includes layers including platinum and layers including cobalt stacked in an alternating arrangement, wherein each of the layers of the multi-layered magnetic stack defines a thickness of less than or equal to approximately 3 nanometers.
3 more elements
Dependencies are inferred from the claim text.