Magnetic recording medium and method for producing the same

Details Magnetic recording medium and method for producing the same Magnetic recording medium and method for producing the same

1993-06-04

1995-05-23

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428336, 428611, 428678, 428694T, 428694TM, 428694TS, G11B 500

Patent

active

054180597

ABSTRACT:
A magnetic recording medium having a nonmagnetic substrate, a first magnetic layer which is formed on a surface of the substrate, has an axis of easy magnetization slanting from a normal line of a layer plane, contains cobalt and oxygen in an amount of not more than 40 atomic % and has a thickness of not larger than 0.15 .mu.m, and a second magnetic layer which is formed on a surface of the first magnetic layer, contains cobalt, has an axis of easy magnetization slanting from a normal line of a layer plane, contains oxygen in an amount of not larger than 37 atomic % and from 61 % to 99 % of the oxygen concentration in the first layer, and has a thickness of not larger than 0.15 .mu.m, which medium has a large S/N ratio.

REFERENCES:
patent: 4387136 (1983-07-01), Saito et al.
patent: 4511635 (1985-04-01), Nagao et al.
patent: 4550062 (1985-10-01), Takayama et al.
patent: 4749628 (1988-07-01), Ahlert et al.
patent: 4855175 (1989-08-01), Wakai et al.

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