Magneto-optical recording medium
AssigneeSharp Kabushiki Kaisha
InventorsJunji Hirokane, Noboru Iwata
Life of this patent
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AssigneeSharp Kabushiki Kaisha
InventorsJunji Hirokane, Noboru Iwata
Estimating the term…
A reproducing layer, an intermediate layer, and a recording layer are successively stacked. The reproducing layer is made of a perpendicularly magnetized film whose domain wall coercivity is relatively smaller and whose domain wall mobility is relatively larger as compared with the recording layer around a reproducing temperature. When the reproducing layer, the intermediate layer, and the recording layer have Curie temperatures of Tc1, Tc2, and Tc3, Tc1, Tc2, and Tc3 satisfy a relationship of Tc2<Tc1<Tc3. Upon reproducing information, the reproducing layer is partially heated to more than the Curie temperature by irradiating with a light beam. This arrangement makes it possible to expand and reproduce a domain without causing a repetition of reproduction and to reproduce a signal having a period which is not more than an optical diffraction limit without reducing an amplitude of the reproduced signal, thereby dramatically improving a recording density.
A magneto-optical recording medium comprising:
A magneto-optical recording medium comprising:
A magneto-optical recording medium comprising:
Dependencies are inferred from the claim text.