Longitudinal magnetic recording media with fine grain crystal ma

Details Longitudinal magnetic recording media with fine grain crystal ma Longitudinal magnetic recording media with fine grain crystal ma

1990-04-17

1992-06-02

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428611, 428678, 428694, 428900, G11B 2300

Patent

active

051185644

ABSTRACT:
The invention discloses a magnetic recording medium used for recording and reproducing information in combination with a magnetic head. The magnetic recording medium in accordance with the present invention comprises a substrate made of a non-magnetic material, an underlayer which is formed on the substrate and has a thickness of 300 to 1000 .ANG. and which consists of a chromium metal or a chromium alloy, and a magnetic recording layer which is formed on the underlayer by vacuum evaporation, which consists essentially of 5 to 15 at% of Cr, 1 to 8 at% of Ta and the balance substantially being Co, and which has a direction of easy magnetization within the surface parallel to the surface of the substrate.

REFERENCES:
patent: 4552820 (1985-11-01), Lin et al.
patent: 4610911 (1986-09-01), Opfer et al.
patent: 4632883 (1986-12-01), Howard et al.
patent: 4677032 (1987-06-01), Robinson
patent: 4929514 (1990-05-01), Natarajan et al.
patent: 4950548 (1990-08-01), Furusawa et al.
patent: 5004652 (1991-04-01), Lal et al.
patent: 5006388 (1991-04-01), Kuzuo et al.

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