Arrangement of magneto-optical recording medium which capable of

Details Arrangement of magneto-optical recording medium which capable of Arrangement of magneto-optical recording medium which capable of

1996-12-18

1998-07-07

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

428694ML, 428694MM, G11B 1100

Patent

active

057779538

ABSTRACT:
A magneto-optical recording medium is arranged so that (1) a first transparent dielectric layer, (2) a reproduction layer showing in-plane magnetization at room temperature while showing perpendicular magnetization in response to temperature rise, (3) a second transparent dielectric layer, (4) a recording layer made of perpendicular magnetization film; and (5) a protective layer are laminated on a substrate in this order. The reproduction layer has a thickness of 5 nm to 30 nm, the second transparent dielectric layer has a thickness of 6 nm to 40 nm, and the recording layer has a thickness of 20 nm to 80 nm. It is possible to separately reproduce individual recording bit even when one or more adjacent recording bits exist within the diameter of the light beam converged onto a target recording bit. This is because the information of a recording magnetic domain of a portion showing in-plane magnetization is masked.

REFERENCES:
patent: 5278810 (1994-01-01), Takahashi et al.
patent: 5283770 (1994-02-01), Nakao et al.
patent: 5428585 (1995-06-01), Hirokane et al.
patent: 5633838 (1997-05-01), Hirokane et al.
K. Tamanoi, et al., Magneto-Optical Recording International Symposium, Magnetically-Induced Super Resolution Using Magneto-Static Coupling, pp. 126, Sep., 1994.

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