Patent ID: 6479169
Filing Date: 2002-11-12
Classification: G11B,Y10T

Abstract:
A magnetic recording medium comprising:a substrate; a first underlayer formed on said substrate; a second underlayer formed on said first underlayer; a nonmagnetic interlayer formed of Co1âˆ’&agr;âˆ’&bgr;âˆ’&ggr;âˆ’&zgr;Cr&agr;X&bgr;Y&ggr;Z&zgr; on said second underlayer, said X being a first material selected one from Ni or Fe, said Y being a second material selected from the group consisting of V, Mo, Ru, Ti, and Mn, said Z being a third material selected from the group consisting of B, Ta, Nb, Zr, W, nitrides and oxides, said a being a value of 25-41%, said &bgr; being a value of 0.1-5%, said &ggr; being a value of 0.1-5%, said &zgr; being a value of 0.1-5%, further, the summation of said &agr;, &bgr;, &ggr;, and &zgr; being smaller than 43% thereby said nonmagnetic interlayer being coherently formed on said second underlayer; and a Co-based magnetic layer formed on said nonmagnetic interlayer.