Magnetic recording medium comprising a magnetic layer containing

Details Magnetic recording medium comprising a magnetic layer containing Magnetic recording medium comprising a magnetic layer containing

1994-07-11

1997-09-23

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428328, 428329, 428330, 428331, 428336, 428402, 428694BA, 428694BS, 428900, 428694BM, 252 6255, G11B 5712

Patent

active

056702450

ABSTRACT:
Disclosed is a magnetic recording medium which comprises a non-magnetic support and a magnetic layer formed thereon and containing at least ferromagnetic metallic powder, and the medium contains an aliphatic acid, wherein average existence ratios of elements in terms of the number of atoms forming the surface of the ferromagnetic metallic powder which is being subjected to orientation treatment in the magnetic layer, are less than 1 of sodium (Na), 40 or less of alkaline earth elements, and 1 to 50 of rare earth elements based on the number of iron (Fe) atom as 100, and the number of carbon atoms of the aliphatic acid being 12 to 24.

REFERENCES:
patent: 3520676 (1970-07-01), Stahr
patent: 4113528 (1978-09-01), Tokuoka et al.
patent: 4780148 (1988-10-01), Vincent et al.
patent: 5219670 (1993-06-01), Ohno et al.
patent: 5405679 (1995-04-01), Isobe

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