Thermomagnetic record carrier

Details Thermomagnetic record carrier Thermomagnetic record carrier

1980-01-10

1982-01-12

Moffitt, James W.

Static information storage and retrieval

Radiant energy

Amorphous

365122, 252 6258, G11C 1306

Patent

active

043108997

ABSTRACT:
A storage medium for use in a device for thermomagnetically writing and magneto-optically reading information. The medium comprises a nonmagnetizable substrate bearing an amorphous layer of a rare earth metal-iron type alloy (which contains from 20 to 30 atomic percent rare-earth metal/iron and 70 to 80 atomic percent iron) to which 15 to 30 atomic percent boron is added. The amorphous layer has a perpendicular easy axis of easy magnetization, required for the writing process, with a good stability against crystallization when heated to higher temperatures.

REFERENCES:
patent: 3739360 (1973-06-01), Lacklison
patent: 3979736 (1976-09-01), Marsh
"An Overview of Optical Data Storage Technology," D. Cher et al., Proc. of the IEEE, vol. 63, No. 8, Aug. 1975, pp. 1207-1230.

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