Magnetic recording disk and magnetic recording and reproducing m

Details Magnetic recording disk and magnetic recording and reproducing m Magnetic recording disk and magnetic recording and reproducing m

1997-06-10

1999-03-02

Resan, Stevan A.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 654, 428 656, 428141, 428216, 428323, 428328, 428694BR, 428694BA, 428900, G11B 570

Patent

active

058768246

ABSTRACT:
A magnetic recording disk favorably employable in a magnetic recording and reproducing method in which a magnetic recording disk is rotated at an increased rotation rate is essentially composed of a flexible support, a non-magnetic undercoating layer, and a thin magnetic layer which has a smooth surface and utilizes an iron-containing ferromagnetic metal powder, wherein the ferromagnetic metal powder contains an amount of an aluminum element in an amount of 5 to 30 atomic % based on the amount of iron element, and the magnetic layer is adjusted to have a squareness ratio of in the range of 0.15 to 0.30.

REFERENCES:
patent: 5455093 (1995-10-01), Kawamata et al.
patent: 5458948 (1995-10-01), Yanagita et al.

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