Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1995-09-26
1998-09-29
Kiliman, Leszek
Stock material or miscellaneous articles
Composite
Of inorganic material
428694RE, 428694MM, 428694EC, 428694IS, 428900, 365 13, 365 14, 3652752, 3652753, 365122, 360 59, 360114, 360131, G11B 566
Patent
active
058144188
ABSTRACT:
In one embodiment, the magneto-optical recording medium of the present invention has a recording layer structure including at least a readout magnetic film, a control magnetic film, and a recording magnetic film. The readout magnetic film is a perpendicular magneto-anisotropy film at a temperature in a predetermined range. The control magnetic film provided between the readout magnetic film and the recording magnetic film has a prescribed structure so as to assume a perpendicular magneto-anisotropy film at a temperature in a predetermined range and an in-plane magneto-anisotropy film at a temperature in a range other than the predetermined range. By irradiating the medium with a readout light, information recorded as a magnetized direction of a domain on the recording magnetic film is copied onto the readout magnetic film through the control magnetic film by an exchange-coupled force in a region whose temperature allows both of the readout magnetic film and the control magnetic film to be perpendicular magneto-anisotropy films. The thus copied information is read out by utilizing the magneto-optical effect of reflected readout light.
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Ota et al, Nikkei Electronics, No. 539, pp. 223-233, 1991, "Development of Magneto-Optical Disk Realizing Double or Higher Density Reproduction".
Birukawa Masahiro
Hino Yasumori
Nishikiori Keiji
Kiliman Leszek
Matsushita Electric - Industrial Co., Ltd.
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