Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1990-06-27
1992-03-10
Thibodeau, Paul J.
Stock material or miscellaneous articles
Composite
Of inorganic material
369 13, 428900, G11B 2300
Patent
active
050949250
ABSTRACT:
An opto-magnetic recording medium having a perpendicularly magnetized film of a dual layer structure comprising a first layer composed of a rare earth-transition metal amorphous thin alloy film and a second layer composed of a rare earth-transition metal amorphous thin alloy film of a composition different from that of the first layer and having a lower curie point and a larger coercive force as compared with that of said first layer, and being capable of transferring bits recorded at a curie point in said second layer to the first layer by exchange-coupling force, said first layer being composed of a GdDyFeCo film in which the sublattice magnetization for transition metal is predominant at a room temperature, the second layer being composed of TbFeCo series film in which sublattice magnetization for rare earth is predominant at a room temperature, and the directions of predominant magnetization between the first layer and the second layer being opposed to each other.
REFERENCES:
patent: 4556291 (1985-12-01), Chen
patent: 4645722 (1987-02-01), Katayama
patent: 4727005 (1988-02-01), Sato
patent: 4855975 (1989-08-01), Akasaka et al.
Saito et al, "Direct Overwrite by Light Power Modulation on Magneto-optical Multi-layered Media," Jap. Jour. Appl. Phys. vol. 26, Supp 26-4 (1987), pp. 155-159.
Ise Tomokazu
Takase Tkeo
Conlin David G.
O'Connell Robert F.
Sharp Kabushiki Kaisha
Thibodeau Paul J.
LandOfFree
Opto-magnetic recording medium does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Opto-magnetic recording medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Opto-magnetic recording medium will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2284076