| 摘要 |
A perpendicular magnetic recording medium includes a non-magnetic substrate; an underlayer including first and second underlayers; and a magnetic recording layer including a layer having a granular structure including grains of a magnetic crystal and grain boundary portions, wherein the first underlayer has a NaCl structure with a (001) orientation and contains a nitride or an oxide of at least one element. The first underlayer may contain a nitride of at least one of Cr, V, Ti, Sc, Mo, Nb, Zr, Y, Al, and B, and the second underlayer may include a plurality of island-shaped regions and contain at least one of Mg, Ca, Co, and Ni. The first underlayer may contains an oxide of at least one of Mg, Ca, Co, and Ni, and the second underlayer may include net-shaped regions and contain at least one of Cr, V, Ti, Sc, Mo, Nb, Zr, Y, Al, B, and C. |
