Magneto-optical recording medium

Details Magneto-optical recording medium Magneto-optical recording medium

1995-10-26

1999-09-28

Kiliman, Leszek

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428336, 428611, 428694ML, 428694SC, 428694RE, 428694EC, 428694MT, 428694MM, 428900, 369 13, 369 14, 365122, G11B 566

Patent

active

059585757

ABSTRACT:
A magneto-optical recording medium is disclosed in which magnetic layer has a multi-layer structure consisting of an artificial lattice film constituted by a Co layer and a Pt layer and/or a Pd layer stacked together and a rare earth-transition metal layer. High coercivity may be achieved by the rare earth-transition metal film whilst a satisfactory Kerr rotation angle in the short wavelength range may be assured by the artificial lattice film. The magneto-optical recording medium may cope with the next-generation high density recording employing a short wavelength laser.

REFERENCES:
patent: 4576699 (1986-03-01), Sato et al.
patent: 4587176 (1986-05-01), Carcia
Patent Abstracts of Japan, vol. 13, No. 149 (p. 855) Apr. 12, 1989 & JP-A-63 311 641 (Sony Corp.) Dec. 20, 1988.
Patent Abstracts of Japan, vol. 14, No. 233 (p. 1049) (4176) May 17, 1990 & JP-A-25 6 752 (Sony Corp.) Feb 26, 1990.
Patent Abstracts of Japan, vol. 15, No. 331 (p. 1241) Aug. 22, 1991, & JP-A-31 20 643 (Sanyo Electric Co. Ltd.), May 22, 1991.
Patent Abstracts of Japan, vol. 15, No. 395 (p. 1260) Oct. 7, 1991 & JP-A-31 57 838 (Nikon Cor.) Jul. 5, 1991.
1989 Digest of Intermag, '89 International Magnetics Conference Mar. 31, 1989, Washington DC, U.S. P. GB-4, R. J. Gambino et al, "Exchange Coupled CoPd/TbCo Magneto-Optic Storage Films".
Nakamura et al, "Magneto-optical Properties of PdCo Based Multilayered Films"; IEEE Trans. Mag. 25(5) Sep. 1989; pp. 3758-3760.
Draaisma, et al "Perpendicular Anisotropy in Pd/Co Multilayers"; J. Appl. Phys. 63(8); Apr. 1988; pp. 3479-3481.
Gambino et al, "Exchange Coupled CoPd/TbCo Magneto-optic Storage Films", IEEE Trans. Mag. 25(5), Sep. 1989; pp. 3749-3751.

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