Magnetic recording medium comprising a glass substrate and a gam

Details Magnetic recording medium comprising a glass substrate and a gam Magnetic recording medium comprising a glass substrate and a gam

1990-04-26

1992-03-10

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428409, 428432, 428694, 428695, 428900, 20419215, 2041922, 360135, 360103, G11B 2300

Patent

active

050948970

ABSTRACT:
A magnetic recording disk comprising a rigid substrate and a magnetic layer of the continuous thin film type is durable and exhibits good electromagnetic properties when the magnetic layer predominantly composed of .gamma.-Fe.sub.2 O.sub.3 has specific peak area ratios in an X-ray diffraction chart thereof. Inclusion of .alpha.-Fe.sub.2 O.sub.3 in the magnetic layer is also effective. Reliable recording/reproduction can be conducted on the magnetic recording disk using a flying magnetic head.

REFERENCES:
patent: 3996095 (1976-12-01), Ahn et al.
patent: 4704199 (1987-11-01), Yokokawa et al.
patent: 4920014 (1990-04-01), Hirai et al.
patent: 4975324 (1990-12-01), Torii et al.

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