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US 8,988,828 B2Granted
Magnetic recording medium and magnetic storage apparatus
AssigneeShowa Denko K.K.
InventorsTetsuya Kanbe, Kazuya Niwa, Yuji Murakami, Lei Zhang
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Abstract
A magnetic recording medium includes a substrate, a magnetic layer including an alloy having an L10 type crystal structure, and a plurality of underlayers arranged between the substrate and the magnetic layer. At least one of the plurality of underlayers is a soft magnetic underlayer formed by an alloy having a hexagonal close packed (hcp) structure and including Co metal or Co as its main component, with a (11•0) plane oriented parallel to a surface of the substrate.
Claims12
A magnetic recording medium comprising:
- a substrate;
- a magnetic layer including an alloy having an L10 type crystal structure;
- and
- a plurality of underlayers arranged between the substrate and the magnetic layer,
- wherein at least one of the plurality of underlayers is a soft magnetic underlayer formed by an alloy having a hexagonal close packed (hcp) structure and including Co metal or Co as its main component, with a (11•0) plane oriented parallel to a surface of the substrate.
2 more elements
A magnetic storage apparatus comprising:
- a magnetic recording medium;
- and
- a head configured to write information on and read information from the magnetic recording medium,
- wherein the magnetic recording medium comprises:
- a substrate;
- a magnetic layer including an alloy having an L10 type crystal structure;
- and
- a plurality of underlayers arranged between the substrate and the magnetic layer,
- wherein at least one of the plurality of underlayers is a soft magnetic underlayer formed by an alloy having a hexagonal close packed (hcp) structure and including Co metal or Co as its main component, with a (11•0) plane oriented parallel to a surface of the substrate.
6 more elements
Dependencies are inferred from the claim text.