Perpendicular magnetic recording media
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, a layer of titanium formed over the substrate, a layer of platinum formed over the layer of titanium, and a multi-layered magnetic stack formed over the layer of platinum. The layer of titanium provides a seed layer to improve the crystal texture of the layer of platinum. The layer of platinum, in turn, provides a seed layer to improve the crystal texture of the multi-layered magnetic stack. In this manner, high perpendicular magnetic anisotropy can be achieved and storage densities can be increased.
Claims33
A magnetic recording medium comprising:
- a substrate;
- a seed layer of titanium formed over the substrate;
- a seed layer of platinum formed over the layer of titanium;
- and
- a multi-layered magnetic stack formed over the layer of platinum, wherein the multi-layered magnetic stack includes a plurality of layers each having a thickness of less than or equal to approximately 3 nanometers.
A magnetic medium comprising:
- a plastic substrate;
- a layer of titanium formed over the substrate, wherein the layer of titanium comprises hexagonal close pack (HCP) crystallites in a (0001) orientation and forms a seed layer;
- a layer of platinum formed over the layer of titanium wherein the layer of platinum comprises face centered cubic (FCC) crystallites in a (111) orientation and forms another seed layer;
- and
- a multi-layered magnetic stack formed over the layer of platinum.
A magnetic medium comprising:
- a plastic substrate;
- a layer of titanium formed over the substrate, wherein the layer of titanium comprises hexagonal close pack (HCP) crystallites in a (0001) orientation and forms a seed layer;
- a layer of palladium formed over the layer of titanium wherein the layer of palladium comprises face centered cubic (FCC) crystallites in a (111) orientation and forms another seed layer;
- and
- a multi-layered magnetic stack formed over the layer of palladium.
A magnetic medium consisting of:
- a substrate;
- a layer of titanium formed over the substrate, wherein the layer of titanium comprises hexagonal close pack (HCP) crystallites in a (0001) orientation and forms a seed layer;
- a layer of platinum formed over the layer of titanium wherein the layer of platinum comprises face centered cubic (FCC) crystallites in a (111) orientation and forms another seed layer;
- and
- a multi-layered magnetic stack formed over the layer of platinum, wherein the multi-layered magnetic stack comprises pairs of alternating layers of platinum and cobalt including face centered cubic (FCC) crystallites in a (111) orientation.
A magnetic medium comprising:
- a substrate;
- a layer of titanium formed over the substrate, wherein the layer of titanium consists essentially of hexagonal close pack (HCP) crystallites in a (0001) orientation and wherein the layer of titanium forms a seed layer;
- a layer of platinum formed over the layer of titanium wherein the layer of platinum consists essentially of face centered cubic (FCC) crystallites in a (111) orientation and wherein the layer of platinum forms another seed layer;
- and
- a multi-layered magnetic stack formed over the layer of platinum, wherein the multi-layered magnetic stack comprises pairs of alternating layers of platinum and cobalt consisting essentially of face centered cubic (FCC) crystallites in a (111) orientation.
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, a seed layer of titanium formed over the substrate, a seed layer of platinum formed over the seed layer of titanium, and a multi-layered magnetic stack formed over the seed layer of platinum.
Dependencies are inferred from the claim text.