Magnetic recording medium and preparation thereof

Details Magnetic recording medium and preparation thereof Magnetic recording medium and preparation thereof

1974-02-28

1976-04-27

Pianalto, Bernard D.

Stock material or miscellaneous articles

Metal continuous phase interengaged with nonmetal continuous...

428900, H01F 1002

Patent

active

039536564

ABSTRACT:
The magnetic recording medium having a magnetic recording layer containing magnetic iron oxide having a cobalt content of 0.5 - 10 wt.% and a ratio of Fe.sup.2.sup.+ /Fe.sup.3.sup.+ of 0.1 - 0.35; wherein the half-value width of the differential curve of the residual magnetization curve is less than 60% of the half-value width of the differential curve of the residual magnetization curve of non-treated magnetic recording layer.

REFERENCES:
patent: 3374113 (1968-03-01), Chang et al.
patent: 3490945 (1970-01-01), Slovinsky
patent: 3573980 (1971-04-01), Haller et al.
patent: 3627580 (1971-12-01), Krall
patent: 3740266 (1973-06-01), Akashi et al.
patent: 3814672 (1974-06-01), Kitamoto et al.
patent: 3824128 (1974-07-01), Akashi et al.

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