Thermomagnetic recording

Details Thermomagnetic recording Thermomagnetic recording

1981-12-28

1984-08-14

Tarcza, Thomas H.

Recorders

Magnetographic

Radiation sensitive

G01D 1512

Patent

active

044660049

ABSTRACT:
A method and apparatus for recording information on a magnetic recording medium with high density is provided. A heat spot of predetermined area is applied to the recording medium to raise the local temperature of the recording medium where the heat spot is applied above the Curie point of the recording medium. The heat spot is moved along the recording medium and a magnetic field is applied when a part of the recording medium heated by the heat spot is in the neighborhood of the Curie point in its cooling process, thereby recording information on the recording medium. In accordance with the present invention, an element or bit of information to be recorded on the recording medium is formed by a portion of the heat spot; thus, it relaxes recording conditions and allows to increase recording density.

REFERENCES:
patent: 3626114 (1971-12-01), Lewicki et al.
Nomura et al., Thermomagnetic Video Recording, NHK Laboratories Note, Mar. 1978.

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