Magneto-optical recording medium
AssigneeSharp Kabushiki Kaisha
InventorsJunichiro Nakayama, Michinobu Mieda, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta
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AssigneeSharp Kabushiki Kaisha
InventorsJunichiro Nakayama, Michinobu Mieda, Hiroyuki Katayama, Akira Takahashi, Kenji Ohta
Estimating the term…
A magneto-optical recording medium includes a first magnetic layer, a second magnetic layer and a third magnetic layer respectively made of rare-earth-transition metal alloys which are laminated in this order. The first magnetic layer has a perpendicular magnetization in a temperature range between room temperature and its Curie temperature. The second magnetic layer made of GdFeCo is set such that its Curie temperature is higher than the Curie temperature of the first magnetic layer, coercive force thereof at room temperature is nearly zero, and that it has an in-plane magnetization at room temperature and a transition occurs therein from the in-plane magnetization to the perpendicular magnetization at above a predetermined temperature. The third magnetic layer is set such that it has a perpendicular magnetization in a temperature range of room temperature and its Curie temperature, its Curie temperature is higher than the Curie temperature of the first magnetic layer, and coercive force thereof at room temperature is smaller than the coercive force of the first magnetic layer.
A magneto-optical recording medium comprising a first magnetic layer formed on a substrate, a second magnetic layer formed over said first magnetic layer and a third magnetic layer formed over said second magnetic layer, said magnetic layers made of rare-earth-transition metal alloys, wherein:
A magneto-optical recording medium comprising a first magnetic layer formed on a substrate, a second magnetic layer formed over said first magnetic layer and a third magnetic layer formed over said second magnetic layer, said magnetic layers made of rare-earth-transition metal alloys, wherein:
A magneto-optical recording medium, comprising a first magnetic layer formed directly over a substrate, a second magnetic layer formed over said first magnetic layer and a third magnetic layer formed over said second magnetic layer;
A magneto-optical recording medium, comprising a first magnetic layer formed directly over a substrate, a second magnetic layer formed over said first magnetic layer and a third magnetic layer formed over said second magnetic layer;
Dependencies are inferred from the claim text.