Magnetic recording medium and process for producing the same

Details Magnetic recording medium and process for producing the same Magnetic recording medium and process for producing the same

1977-08-18

1980-11-04

Silverman, Stanley S.

Coating processes

Magnetic base or coating

Magnetic coating

204192M, 252 6255, 252 6256, 252 6257, 252 6258, 252 6259, 252 626, 427132, 428900, G11B 584

Patent

active

042320615

ABSTRACT:
A thin film of ferrite for use as a magnetic recording medium includes (a) Cu and Ti or (b) Cu, Ti and Co. The inclusion of Ti extends upwards the upper limit of the range of temperature for reducing .alpha.-Fe.sub.2 O.sub.3 to Fe.sub.3 O.sub.4, whereas the inclusion of Cu extends downwards the lower limit of this range. Further, the inclusion of both Ti and Cu enables the stable production of .gamma.-Fe.sub.2 O.sub.3 over a wide range of temperature for oxidizing Fe.sub.3 O.sub.4 to said .gamma.-Fe.sub.2 O.sub.3. The inclusion of Co improves the magnetic properties of the ferrite.

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patent: 3995093 (1976-11-01), Heinz
patent: 3996095 (1976-12-01), Ahn et al.
patent: 4003813 (1977-01-01), Hattori et al.
patent: 4013534 (1977-03-01), Ishii
patent: 4032674 (1977-06-01), Hirabagaski et al.
patent: 4086174 (1978-04-01), Bennet et al.
patent: 4156037 (1979-05-01), Hattori et al.

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