Magneto-optical recording medium and reproduction method therefo

Details Magneto-optical recording medium and reproduction method therefo Magneto-optical recording medium and reproduction method therefo

1998-08-27

2000-09-19

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369288, 369116, G11B 1304, G11B 1100

Patent

active

061222283

ABSTRACT:
A magneto-optical recording medium comprises, on a substrate, a dielectric layer, a GdFeCo reproducing layer, a non-magnetic layer, and a TbFeCo recording layer. Upon reproduction, a DC magnetic field Hex is applied in the recording direction, and a reproducing light beam is radiated while being modulated to have a low power and a high power in synchronization with a reproducing clock. The reproducing layer is a magnetic film which changes from in-plane magnetization into perpendicular magnetization at a critical temperature Tcr, which has a compensation temperature Tcomp between room temperature and a Curie temperature Tc, and which satisfies Troom<Tcr<Tcomp<Tco<Tc in relation to a Curie temperature Tco of the recording layer.

REFERENCES:
patent: 5615182 (1997-03-01), Murakami et al.
patent: 5751669 (1998-05-01), Shiratori
Journal of Magnetic Society of Japan, vol. 17 Supplement No. S1, p. 201 (1993).

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