PERPENDICULAR MAGNETIC RECORDING MEDIA HAVING A CAP LAYER FORMED FROM A CoPtCr ALLOY
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United States of America Patent
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Issued Date -
Mar 25, 2010
app pub date -
Sep 19, 2008
filing date -
Sep 19, 2008
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Abstract
Perpendicular magnetic recording (PMR) media and methods of fabricating PMR media are described. The PMR media includes, among other layers, a perpendicular magnetic recording layer and a cap layer that are exchange coupled. The magnetic recording layer and the cap layer may be exchange coupled through direct contact, or may be exchange coupled over a coupling layer. In either embodiment, the cap layer is formed from a CoPtCr alloy having a concentration of Cr in the range of about 15-22 at %.
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