Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1987-07-31

1990-03-27

McCamish, Marion C.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428328, 428694, G11B 566

Patent

active

049119974

ABSTRACT:
A magnetic recording medium whose output is increased over a wide range of from long wavelengths to short wavelengths and whose output fluctuation with rotation period is decreased when rotating and reproducing in the form of a disk is provided comprising a non-magnetic support and a magnetic layer provided thereon containing a ferromagnetic substance, the magnetic layer having a multilayer structure consisting of a lower layer containing a ferromagnetic substance in an ellipsoidal shape with ##EQU1## and a saturation magnetization of at least 60 emu/g and an upper layer containing a ferromagnetic substance of plate-shaped hexagonal system having the axis of easy magnetization in the vertical direction to the plate surface.

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patent: 4565726 (1986-01-01), Oguchi et al.
patent: 4624883 (1986-11-01), Yamaguchi et al.
patent: 4624894 (1986-11-01), Kishimoto
patent: 4657813 (1987-04-01), Asai et al.

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