Thermally assisted magnetic recording medium and thermally assisted magnetic recording apparatus
AssigneeKabushiki Kaisha Toshiba
InventorSoichi Oikawa
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Abstract
According to one embodiment, a thermally assisted magnetic recording method performs heating at a temperature higher than the ambient temperature of the perpendicular recording medium and lower than a temperature at which a nucleation magnetic field Hn of the recording portion is 0, decreases a coercive force Hc of a recording portion by heating a perpendicular recording medium, and records magnetic information by applying a recording magnetic field from a recording magnetic pole to the recording portion having the decreased coercive force.
Claims8
A thermally assisted magnetic recording method, comprising:
- decreasing a coercive force Hc of a recording portion by heating a perpendicular recording medium;
- and
- recording magnetic information by applying a recording magnetic field from a recording magnetic pole to the recording portion having the decreased coercive force,
- wherein the heating is performed at a temperature higher than an ambient temperature of the perpendicular recording medium and lower than a temperature at which a nucleation magnetic field Hn of the recording portion is 0, and
- wherein the perpendicular recording medium includes a magnetic recording layer with a multi-grain structure in which magnetic grains are magnetically isolated.
A thermally assisted magnetic recording apparatus comprising:
- a heating source configured to heat a recording portion of a perpendicular recording medium;
- and
- a head including a recording magnetic pole configured to record magnetic information by applying a recording magnetic field to the recording portion having a coercive force Hc decreased by heating by the heating source,
- wherein the heating is performed at a temperature higher than an ambient temperature of the perpendicular recording medium and lower than a temperature at which a nucleation magnetic field Hn of the recording portion is 0, and
- wherein the perpendicular recording medium includes a magnetic recording layer with a multi-grain structure in which magnetic grains are magnetically isolated.
Dependencies are inferred from the claim text.