Magnetooptical recording medium on which high-density informatio

Details Magnetooptical recording medium on which high-density informatio Magnetooptical recording medium on which high-density informatio

1997-06-05

2000-02-22

Kiliman, Leszek

Stock material or miscellaneous articles

Composite

Of inorganic material

428694MT, 428694RE, 428694MM, 428694EC, 428900, 369 13, 369 14, 3692752, 3692753, 360 59, 360114, 360131, 365122, G11B 566

Patent

active

060278250

ABSTRACT:
A magnetooptical recording medium includes a first magnetic layer, a second magnetic layer whose Curie temperature is lower than that of the first magnetic layer, and a third magnetic layer, comprising a vertically-magnetizing film, whose Curie temperature is higher than that of the second magnetic layer. The first magnetic layer, the second magnetic layer and the third magnetic layer are in a state of exchange coupling with each other at a portion of a vertically-magnetizing film. A domain walls formed in the first magnetic layer moves when the temperature of the medium has been raised to at least the Curie temperature of the second magnetic layer.

REFERENCES:
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patent: 5168482 (1992-12-01), Aratani et al.
patent: 5278810 (1994-01-01), Takahashi et al.
patent: 5343449 (1994-08-01), Miyata
Ohta et al "Read out Mechanism of Magnetically Induced Super Resolution"; J. Magn. Soc. Jpn. vol. 15; S1(1991) pp. 319-322.
Fukumoto, et al., "Superresolution of Optical Disks Using a Small Aperture," Japanese Journal of Applied Physics Part 1, vol. 31, No. 2B, Feb. 1992, Tokyo, Japan, pp. 529-533.
Kaneko, et al., "Multilayered Magneto-Optical Disks for Magnetically Induced Superresolution," Japanese Journal of Applied Physics Part 1, vol. 31, No. 2B, Feb. 1992, Tokyo, Japan, pp. 568-575.
Yoshimura, el al., "Large-capacity Magneto-optical Disk System Using Magnetically Induced Super Resolution," IEEE Transactions on Consumer Electronics, vol. 38, No. 3, Aug. 1992, New York, NY, pp. 660-664.

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