Metal thin film magnetic recording medium having a Cr Ta Cu underlayer and a copt magnetic layer
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United States of America Patent
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Nov 17, 1998
Grant Date -
N/A
app pub date -
Apr 25, 1997
filing date -
Nov 20, 1995
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Abstract
A magnetic recording medium has a magnetic layer of a Co alloy with a Pt content of about 3 to about 6 atomic % and is given a higher coercive force. The medium includes a ground layer formed on a nonmagnetic base plate and having a composition comprising, as expressed in atomic %, 1 to 6% of Ta, 1 to 6% of Cu and the balance substantially Cr, whereby an increased crystal lattice constant is afforded to the Cr.
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