Magnetic recording medium having a cobalt-plantinum-chromium all

Details Magnetic recording medium having a cobalt-plantinum-chromium all Magnetic recording medium having a cobalt-plantinum-chromium all

1992-11-10

1994-03-29

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428611, 428667, 428694TS, 428900, 428928, G11B 500

Patent

active

052983242

ABSTRACT:
In a rigid magnetic recording disk, the magnetic properties, such as the coercivity, of a cobalt based, hard, magnetic alloy, such as a cobalt-platinum-chromium (CoPtCr) thin film magnetic recording layer, are controlled by providing a thin, sputtered, underlayer of a nonmagnetic, binary, chromium-tungsten (CrW) alloy whose major constituent is chromium, and preferably of a composition Cr.sub.88 W.sub.12 upon which the thin film magnetic recording layer is subsequently sputter deposited.

REFERENCES:
patent: 4079169 (1978-03-01), Nigh et al.
patent: 4652499 (1987-03-01), Howard
patent: 4654276 (1987-03-01), Ahlert et al.
patent: 4677032 (1987-06-01), Robinson
patent: 4749459 (1988-06-01), Yamashita et al.
patent: 5143794 (1992-09-01), Suzuki et al.

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