Magnetic recording medium, producing method of the same and magnetic recording system
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United States of America Patent
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Apr 8, 2003
Grant Date -
N/A
app pub date -
Mar 10, 2000
filing date -
Mar 11, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a magnetic recording medium having Co-based alloy magnetic layer containing Pt formed on a substrate through an underlayer, by forming said underlayer with plural underlayers including double layer structure which is formed by piling up 1st underlayer of Cr-based alloy containing Ti and 2nd underlayer of Cr-based alloy containing at least one element selected from a group comprising Mo and W in this sequence, crystal grain diameter is decreased and then medium noise can be decreased, and c axis is oriented to in-plane direction and then high coercivity can be obtained, consequently the magnetic recording medium having high signal to noise ratio at high recording density region is obtained. Further a small size large capacity magnetic recording system can be provided by combination of said magnetic recording media with a MR (magnetoresistive) head.
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