Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Patent
1996-04-12
1998-08-04
Edun, Muhammad N.
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
369283, 369 13, G11B 700
Patent
active
057905134
ABSTRACT:
A magneto-optical recording medium includes a first magnetic layer which becomes an in-plane magnetization film at room temperature, and a perpendicular magnetization film at a temperature between room temperature and the Curie temperature of the layer, a second magnetic layer which has a Curie temperature lower than the Curie temperature of the first magnetic layer, remains a perpendicular magnetization film from room temperature to its Curie temperature, and is stacked on the first magnetic layer, and a third magnetic layer which is arranged between the first and second magnetic layers and has a Curie temperature lower than the Curie temperatures of the first and second magnetic layers. The first magnetic layer is magnetostatically coupled with the second magnetic layer in a region where the temperature of the third magnetic layer has reached the Curie temperature or more. An information reproduction method of reproducing information from the medium is also disclosed.
REFERENCES:
patent: 5428585 (1995-06-01), Hirokane et al.
patent: 5563852 (1996-10-01), Morakami et al.
Hiroki Tomoyuki
Nishimura Naoki
Canon Kabushiki Kaisha
Edun Muhammad N.
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