Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1974-08-19

1976-03-09

Satterfield, Walter R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

75 5AA, 148108, 427132, 428432, H01F 102

Patent

active

039430120

ABSTRACT:
A magnetic recording medium for high density recording comprising a support having thereon a magnetic recording layer comprising a ferromagnetic metal powder of the Fe-Co-Cr-B system and having a coercive force of about 700 to 500 oersteds in the oriented direction of the magnetic substance and a residual magnetic flux density of about 1500 gausses or more, the residual magnetic flux density of which after storage for 160 hours under the conditions of a temperature of 60.degree.C and 90%RH is 85% or more of the initial value thereof before storage under these conditions in a binder. The magnetic recording medium is especially suitable for high density recording, having sufficient sensitivity and excellent resistance.

REFERENCES:
patent: 3206338 (1965-09-01), Miller et al.
patent: 3535104 (1970-10-01), Little et al.
patent: 3567525 (1971-03-01), Graham et al.
patent: 3661556 (1972-03-01), Jolley et al.
patent: 3821025 (1974-06-01), Akashi et al.

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