Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1995-09-28
1998-10-20
Zimmerman, John J.
Stock material or miscellaneous articles
Composite
Of inorganic material
428694RE, 428694MM, 428694GR, 369 13, 369288, G11B 5716, G11B 1100, G11B 566
Patent
active
058244263
ABSTRACT:
A magneto-optical recording medium includes a readout layer having in-plane magnetization at room temperature and in which a transition occurs from in-plane magnetization to a perpendicular magnetization when temperature rises, and a recording layer for storing information thereon magneto-optically. In the readout layer made of GdFeCo by adding Nd thereto, an amount of Nd to be added changes in a direction perpendicular to its film surface, and an amount of Nd is larger on a light incidence side than on the other side. As a result, even when a laser with a short wavelength is used, high density recording can be achieved as undesirable recording and reproducing operations due to a change in a magnetic interaction is prevented and also deterioration in quality of a reproducing signal is prevented.
REFERENCES:
patent: 5053287 (1991-10-01), Mizumoto et al.
patent: 5094925 (1992-03-01), Ise et al.
patent: 5248565 (1993-09-01), Tsutsumi et al.
patent: 5357494 (1994-10-01), Aratani
patent: 5428585 (1995-06-01), Hirakane et al.
patent: 5436072 (1995-07-01), Hatwar et al.
patent: 5450382 (1995-09-01), Shiratori et al.
patent: 5452272 (1995-09-01), Murakami et al.
patent: 5486395 (1996-01-01), Murakami et al.
Y.J. Choe et al., Journal of Japan Applied Magnetics, "Magneto-Optical kerr Effects of Nd-(Fe, Co) Thin Films", 12:2, pp. 207-210 (1988) (No Month).
M. Ishida et al., Abstracts of 17th Lecture Meeting Held by Japan Applied Magnetics, "Effect of Nd Content On Short-Wavelength Magneto-Optical Disk", p. 54 (1993) (No Month).
Iketani Naoyasu
Murakami Yoshiteru
Ohta Kenji
Takahashi Akira
Buckley Linda M.
Conlin David G.
LaVilla Michael
Sharp Kabushiki kaisga
Zimmerman John J.
LandOfFree
Magneto-optical 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 Magneto-optical recording medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto-optical recording medium will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-242494