Microgap recording using ferrimagnetic medium for magneto-optic

Details Microgap recording using ferrimagnetic medium for magneto-optic Microgap recording using ferrimagnetic medium for magneto-optic

1987-12-28

1989-02-14

Channey, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Thermomagnetic recording or transducers

360114, G11B 502

Patent

active

048050431

ABSTRACT:
A ferrimagnetic medium is locally heated above its compensation temperature and a magnetic record head provides a magnetic field for data recording on the heated portion of the medium. Upon re-cooling to the compensation temperature, the recorded signal is magnetically "locked" in the medium. The user of a magnetic head to provide the recording magnetic field allows fast head current switching rates with attendant high density data recording or high speed erasure of the medium. The recorded medium is read by means of conventional magneto-optic apparatus.

REFERENCES:
patent: 3731290 (1973-05-01), Aagard
patent: 4302790 (1981-11-01), Lemke
patent: 4340914 (1982-07-01), Hanaoka
patent: 4520409 (1985-05-01), Kimoto et al.
patent: 4588995 (1986-05-01), Nishimura et al.
patent: 4599658 (1986-07-01), Saitoh et al.

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