Magneto-optical recording medium having two RE-TM layers with th

Details Magneto-optical recording medium having two RE-TM layers with th Magneto-optical recording medium having two RE-TM layers with th

1992-11-03

1994-06-28

Pascal, Robert J.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

3692752, 428694R, G11B 1304

Patent

active

053253434

ABSTRACT:
The medium consists of two exchange-coupled RE-TM amorphous layers (a memory layer and a reference layer) whose Curie temperatures are almost the same and only one of which is RE-rich without a compensation temperature, the two layers being laminated directly or indirectly with an intermediate layer that allows exchange-coupling to be interposed. Before recording is carried out, the reference layer is magnetized in one direction. Pulses of energy are emitted from the memory layer side so that the temperature of the reference layer remains below its Curie temperature when one of the bit data is recorded but reaches its Curie temperature when the other of the bit data is recorded.

REFERENCES:
patent: 4926402 (1990-05-01), Masakawa
patent: 5088074 (1992-02-01), Sato
patent: 5224080 (1993-06-01), Ohtsuki

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