Magnetic recording medium and magnetic storage apparatus
AssigneeFujitsu Limited
InventorsE. Noel Abarra, Iwao Okamoto
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Abstract
A magnetic recording medium is constructed to include a substrate, a magnetic layer made of a Co or Co-based alloy, and an underlayer disposed between the substrate and the magnetic layer. The underlayer is made of an ordered intermetallic material of FCC L12 or FCT L10 crystalline structure, so that c-axis of the magnetic layer is aligned in a predetermined direction.
Claims25
A magnetic recording medium comprising:
- a substrate;
- a magnetic layer made of a Co or Co-based alloy;
- and
- an underlayer disposed between said substrate and said magnetic layer,
- said underlayer being made of an ordered intermetallic material of FCC L12 or FCT L10 crystalline structure, so that c-axis of said magnetic layer is aligned in a predetermined direction.
A method of producing a magnetic recording medium which includes a base layer, a magnetic layer made of Co or a Co-based alloy, and an underlayer disposed between the base layer and the magnetic layer, said method comprising step of:
- (a) depositing the underlayer which is made of a (111)-textured ordered intermetallic material of FCC L12 crystalline structure or FCT L10 crystalline structure on the base layer which is made of glass or oxidized NiP, at a deposition temperature of approximately 140 to approximately 180° C.
A magnetic storage apparatus comprising:
- a head;
- and
- at least one magnetic recording medium which includes a substrate, a magnetic layer made of Co or a Co-based alloy, and an underlayer disposed between the substrate and the magnetic layer,
- said underlayer being made of an ordered intermetallic material of FCC L12 crystalline structure or FCT L10 crystalline structure on the substrate, so that c-axis of the magnetic layer is aligned in a predetermined direction.
Dependencies are inferred from the claim text.