Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1995-12-18
1998-01-20
Neyzari, Ali
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
428694MM, G11B 1100
Patent
active
057107467
ABSTRACT:
A magneto-optical disc (1) includes a write/read magnetic layer (4) with high coercivity on a substrate (2) and an auxiliary magnetic layer (6) with low coercivity thereon in a magnetostatically coupled manner. Both the magnetic layers are recorded. Prior to or during reading, an external magnetic field of controlled strength is applied to initialize the auxiliary magnetic layer (6). The recorded magnetization information in the write/read magnetic layer (4) is read out by irradiating reading light from the side of write/read magnetic layer (4). Reading with improved C/N is possible.
REFERENCES:
patent: 5187694 (1993-02-01), Ichihara
patent: 5593791 (1997-01-01), Fugii et al.
Inoue Hiroyasu
Kosuda Masanori
Kuribayashi Isamu
Uchiyama Kenji
Utsunomiya Hajime
Neyzari Ali
TDK Corporation
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