PERPENDICULAR MAGNETIC RECORDING MEDIUM
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United States of America Patent
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Issued Date -
Jan 5, 2017
app pub date -
Aug 31, 2015
filing date -
Jun 30, 2015
priority date (Note) -
Abandoned
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Abstract
According to one embodiment, a perpendicular magnetic recording medium includes an underlying layer with convexes arranged with 1 to 20 nm intervals, and a multilayered amorphous magnetic recording layer formed on the underlying layer. The multilayered amorphous magnetic recording layer includes a first amorphous magnetic recording layer with a plurality of magnetic grains each formed on a corresponding convex to be widened toward its tip and being separated from each other at least in the convex side, a nonmagnetic protective layer covering at least a part of a sidewall of the magnetic particle, and a second amorphous magnetic recording layer formed on the nonmagnetic protective layer.
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