Dynamic magnetic information storage or retrieval – Record medium – Disk
Reexamination Certificate
2007-10-23
2007-10-23
Castro, Angel (Department: 2627)
Dynamic magnetic information storage or retrieval
Record medium
Disk
C428S817000
Reexamination Certificate
active
10813005
ABSTRACT:
A CoPt- or FePt-alloy magnetic material in which a temperature to transform into an L10-ordered alloy is reduced and magnetic anisotropy energy is controlled, and a method for manufacturing the magnetic material are provided. In a CoPt- or FePt-alloy magnetic material obtained according to plating, at least one element of Cu, Ni and B is contained with an atomic percent equal to or more than 1% and equal to or less than 40%. A method for manufacturing a magnetic material includes a step of depositing a magnetic material in which at least one element of Cu, Ni and B is contained in a CoPt- or FePt-alloy magnetic material with an atomic percent equal to or more than 1% and equal to or less than 40%, from a plating solution, and a step of transforming the deposited magnetic material into an L10-ordered alloy according to annealing at a temperature equal to or lower than 500° C.
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Den Tohru
Yasui Nobuhiro
Castro Angel
Magee Christopher R.
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