Magneto-optical recording medium having an enlarged magnetic dom

Details Magneto-optical recording medium having an enlarged magnetic dom Magneto-optical recording medium having an enlarged magnetic dom

1998-06-29

2000-03-28

Dinh, Tan

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

428694ML, G11B 1100

Patent

active

060440449

ABSTRACT:
A magneto-optical recording medium comprises a substrate, and a magnetic multilayer 4 on a surface side thereof. The magnetic multilayer comprises an amplifying layer A.sub.1 and a recording layer R.sub.2 which are laminated together and are each a magnetic layer. A nonmagnetic intermediate layer I.sub.12 is interleaved between the amplifying layer A.sub.1 and the recording layer R.sub.2 to couple them magnetostatically. The nonmagnetic intermediate layer I.sub.12 is made up of a metal oxide and has a thickness of 2 to 30 nm. The magnetic field intensity needed for magnetic field modulation reading or light modulation reading can be lowered.

REFERENCES:
patent: 5640374 (1997-06-01), Hirokane et al.
patent: 5659537 (1997-08-01), Hirokane et al.
patent: 5684764 (1997-11-01), Hirokane et al.
patent: 5838645 (1998-11-01), Hirokane et al.
30a-NF-2; External Magentic Field Characteristics of Magnetic Expansion Readout; N. Takagi et al, Mar. 30, 1997.
30a-NF-4; Magentic Expanding MO Readout Using Pulsed-Laser Beam; Hitachi Maxell, Ltd. et al, Mar. 30, 1997.
30a-NF-5; Magnetic Domain Expansion for o.1 um Domain Recorded By Magnetic Field Modulation; Mammos. H. Awano et al, Mar. 30, 1997.

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