Magneto-optical recording medium having two magnetic layers of e

Details Magneto-optical recording medium having two magnetic layers of e Magneto-optical recording medium having two magnetic layers of e

1996-02-06

1997-09-02

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

428694ML, 428694SC, G11B 1100

Patent

active

056639350

ABSTRACT:
Binary recording is carried out with an optical recording medium having at least a recording layer, and an auxiliary layer which is in an antiferromagnetic phase at room temperature and which exhibits temperature hysteresis such that it changes upon elevation of temperature from the antiferromagnetic phase to a ferromagnetic phase at a temperature T1 higher than the room temperature but lower than the Curie temperature of the recording layer. Upon a drop in temperature from that state, it changes from the ferromagnetic phase into the antiferromagnetic phase at a temperature lower than T1 but higher than room temperature.

REFERENCES:
patent: 5216663 (1993-06-01), Tsutsumi et al.
patent: 5265073 (1993-11-01), Osato
patent: 5440531 (1995-08-01), Sato et al.
patent: 5481410 (1996-01-01), Osato et al.
patent: 5512366 (1996-04-01), Nakaki et al.

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