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AssigneeShowa Denko K.K.
InventorsRyuji Sakaguchi, Gohei Kurokawak, Yuzo Sasaki, Tatsu Komatsuda, Amarendra K. Singh
Estimating the term…
In a perpendicular magnetic recording medium having at least a soft magnetic back layer, an underlayer, an intermediate layer and a perpendicular magnetic recording layer on a nonmagnetic substrate, at least one layer in the intermediate layer contains Re as a main component element and contains, as a second main component element, an element having an hcp structure or an element having a bcc structure. The concentration of Re as the main component element of the intermediate layer is within the range from 55 to 99.5 atomic percent. The second component element is Co or Cr.
A perpendicular magnetic recording medium comprising at least a soft magnetic back layer, an underlayer, an intermediate layer and a perpendicular magnetic recording layer on a nonmagnetic substrate, wherein at least one layer in the intermediate layer contains Re as a main component element and contains, as a second main component element, an element having an hcp structure or an element having a bcc structure.
Dependencies are inferred from the claim text.