Magneto-optical recording medium having two magnetic layers with

Details Magneto-optical recording medium having two magnetic layers with Magneto-optical recording medium having two magnetic layers with

1995-08-23

1996-12-24

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

360 59, G11B 502, G11B 1100

Patent

active

055879748

ABSTRACT:
A magneto-optical recording medium and an information recording method using the medium in which over-write is performed by magnetic field modulation. The magneto-optical recording medium includes a second magnetic layer (initializing layer) consisting of a magnetic layer, which is magnetized in advance in one direction, has a high Curie temperature, does not lose magnetization in a recording/erasing mode, and has a perpendicular magnetic anisotropy, and a first magnetic layer (recording layer) having a perpendicular magnetic anisotropy and exchange-coupled to the second magnetic layer. The data transfer speed in an over-write operation is remarkably increased when recording is performed by turning on/off an external magnetic field in accordance with information while radiating a lazer beam using the magnetooptical recording medium.

REFERENCES:
patent: 5168482 (1992-12-01), Aratani et al.
patent: 5239524 (1993-03-01), Sato et al.
patent: 5450382 (1995-09-01), Shiratori

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