Direct-overwrite magneto-optic media

Details Direct-overwrite magneto-optic media Direct-overwrite magneto-optic media

1989-08-01

1992-02-11

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Composite

Of inorganic material

428900, 369 13, 369 14, G11B 566

Patent

active

050875329

ABSTRACT:
A magneto-optic recording medium records data in a single, direct-overwrite step. The medium includes a magneto-optical storage layer and a magnetic biasing layer disposed in selected heat conductive relationship with the storage layer. The first magnetic field is generated externally of the storage layer at a first energy level of a laser to set the magnetic orientation of domains at the storage layer. At a second energy level of the laser, which is higher than the first energy level, the magnetic biasing layer provides a second magnetic field greater than the first magnetic field for setting the magnetic orientation of domains in the storage layer.

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J. Saito, M. Sato, H. Matsumoto, H. Akasaka, "Proc. Int. Symp. Optical Memory, 1987", Jpn. J. Appl. Phys. 26 (1987), Supp. 26-4, p. 155.
H.A.M. van den Berg, R. Roeckelein, IEEE Trans. Magn. MAG-25 (1989), 4036.

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