Magneto-optical recording medium and system for use with short w

Details Magneto-optical recording medium and system for use with short w Magneto-optical recording medium and system for use with short w

1991-09-06

1992-12-22

Nguyen, Hoa T.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, 360114, 428694, G11B 1304

Patent

active

051738856

ABSTRACT:
A magneto-optical medium is comprised of three layers. The first layer is made of a rare earth-transition metal amorphous film from one to twenty nanometers thick. The second layer is comprised of a rear earth-transition metal amorphous film or crystalline film and is one to twenty nanometers thick. The third layer is comprised of a rare earth-transition metal amorphous film and is not less than two nanometers thick. The resulting medium has a sufficiently large magneto-optical effect even at short wave lengths and is perpendicular magnetized film. A data storage system including the magneto-optical medium therein.

REFERENCES:
patent: 4998231 (1991-03-01), Watanabe et al.
patent: 5016232 (1991-05-01), Tadokoro et al.
patent: 5030512 (1991-07-01), Kato et al.
Ito et al, "Magnetic and magneto-optical properties of Nd alloy multilayers", Digest of the 13th annual conference on magnetics in Japan (1989), p. 325.
McGuire et al, "Magneto-optical properties of Nd-Co and Nd-Fe alloys", J. Appl. phys. 61(8), Apr. 15, 1987, pp. 3352-3354.
"Magnetic and Magneto-Optical Properties of Co/TbFeCo Exchange Coupled Films", H. Wakabayashi, et al., Digest of the 13th annual conference on magnetics in Japan (1989), p. 326.

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