Process for producing ferromagnetic iron oxide

Details Process for producing ferromagnetic iron oxide Process for producing ferromagnetic iron oxide

1975-12-22

1978-08-22

Cooper, Jack

Compositions

Magnetic

Iron-oxygen compound containing

423634, C01G 4906

Patent

active

041087879

ABSTRACT:
In ferromagnetic powders mainly composed of iron oxide, the ferromagnetic iron oxide(s) comprise a superparamagnetic material which provides a peak showing superparamagnetism by measurement of the Mossbauer Effect spectrum. The ferromagnetic iron oxides are suitable for making highly sensitive magnetic recording media having excellent frequency response with lowered modulation noise.

REFERENCES:
patent: 3075919 (1963-01-01), Gruber et al.
patent: 3382174 (1968-05-01), Hund
patent: 3725126 (1973-04-01), Haller
patent: 3748270 (1973-07-01), Hwang
patent: 3873462 (1975-03-01), Trandell et al.
patent: 3974079 (1976-08-01), Woditsch et al.
Kundig et al., "Physical Review", vol. 142, No. 2, Feb. 1966, pp. 327-333.

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