Magneto-optical recording apparatus

Details Magneto-optical recording apparatus Magneto-optical recording apparatus

1992-07-28

1994-10-04

Hajec, Donald

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

360114, 369100, G11B 502, G11B 5127, G11B 700

Patent

active

053531710

ABSTRACT:
A magneto-optical recording apparatus records information on a magneto-optical recording medium composed of a memory layer and a recording layer which are disposed on a substrate, each comprising a magnetic thin film of amorphous-rare-earth transition-metal alloy. The memory and recording layers are magnetically coupled directly, or through an intermediate layer therebetween, to each other under an exchange force. A recording magnetic field generator such as a permanent magnet or an electromagnet applies a recording magnetic field to the magneto-optical recording medium, and an initializing magnetic field generator such as a permanent magnet or an electromagnet applies an initializing magnetic force to the magneto-optical recording medium. The initializing magnetic field generator has a magnetic pole confronting a surface of the magneto-optical recording medium. The initializing magnetic force comprises a magnetic field H.sub.V directed perpendicularly to the surface of the magneto-optical recording medium, and a magnetic field H.sub.H directed along the surface of the magneto-optical recording medium. The magnetic fields H.sub.V, H.sub.H are defined as follows:

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Patent Abstracts of Japan, vol. 13, No. 239, Nippon Teleger & Teleph Corp., Feb. 16, 1989.

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