Method of recording information on a recording medium having at

Details Method of recording information on a recording medium having at Method of recording information on a recording medium having at

1992-11-20

1993-08-03

LaRoche, Eugene R.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369100, 3692752, 369283, G11B 1110

Patent

active

052335780

ABSTRACT:
Disclosed is a method of recording information on a magnetooptical recording medium, which medium includes a first magnetic layer and a second magnetic layer having a lower Curie temperature and a higher coercive force at room temperature than those of the first magnetic layer. The second magnetic layer is exchange-coupled to the first magnetic layer. The first magnetic layer has a higher compensation temperature than the Curie temperature of the second magnetic layer. The method of recording information includes applying a magnetic field, which is modified in accordance with information from a magnetic head, to the medium to record information on the first magnetic layer and scanning the medium with a light beam to heat the medium to a temperature at least near the Curie temperature of the second magnetic layer so as to transfer the information recorded on the first magnetic layer to the second magnetic layer.

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G. H. May, "Beam Addressable High-Density Magnetic Record File," IBM Technical Disclosure Bulletin, vol. 16, No. 7, Nov. 1973, pp. 2365-2366.

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