Magnetic recording medium of thin metal film type
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United States of America Patent
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Jan 21, 1992
Grant Date -
N/A
app pub date -
Oct 20, 1989
filing date -
Oct 21, 1988
priority date (Note) -
Expired
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Abstract
A magnetic recording medium having excellent noise characteristics and comprising a metal magnetic film formed on a nonmagnetic substrate and made of (1) a Co-Cr-Nb alloy, or (2) a Co-Cr-Ni-Nb alloy. The alloys (1) and (2) are represented respectively by the following formulae: Co.sub.1-x-z Cr.sub.x Nb.sub.z (1) Co.sub.1-x-y-z Cr.sub.x Ni.sub.y Nb.sub.z (2) wherein x, y and z each represent an atomic ratio, x is 0.08 to 0.15, y is 0.05 to 0.25 and z is 0.03 to 0.10.
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