Magnetic recording medium, process for producing the same and ma

Details Magnetic recording medium, process for producing the same and ma Magnetic recording medium, process for producing the same and ma

1998-03-19

2000-02-01

Kiliman, Leszek

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428336, 428692, 428694R, 428694T, 428694TS, 428694TM, 428 653, 428 657, 427128, 427129, 427130, 360113, 360135, G11B 566

Patent

active

06020060&

ABSTRACT:
A magnetic recording medium characterized by comprising: a nonmagnetic substrate; and, provided on the nonmagnetic substrate in the following order, a first underlayer of a nonmagnetic material composed mainly of chromium, a second underlayer of an antiferromagnetic material, with a body-centered cubic structure, having a Neel temperature of at least 60.degree. C., the second underlayer being such that, when the crystal lattice of the antiferromagnetic material is compared with the crystal lattice in the body-centered cubic structure of the first underlayer, the length of a side of the lattice in the (100) face of the former is approximately equal to the length of a diagonal of the lattice in the (100) face of the latter, permitting the second underlayer to be epitaxially grown onto the first underlayer, and a recording layer of a magnetic material composed mainly of cobalt.

REFERENCES:
patent: 5004652 (1991-04-01), Lal et al.
patent: 5302434 (1994-04-01), Doerner
patent: 5800931 (1998-09-01), Lee
patent: 5900324 (1999-05-01), Moroishi
patent: 5922456 (1999-07-01), Tanahashi

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