Patent ID: 7138195
Filing Date: 2006-11-21
Classification: B82Y,G11B

Abstract:
1. A perpendicular magnetic recording medium comprising: a substrate, a soft magnetic underlayer formed on the substrate, said soft magnetic underlayer containing Fe as a first element, at least one of C and N as a second element and at least one kind of element selected from Ta, Hf, Nb, Ti and Zr as a third element, a non-magnetic amorphous intermediate layer containing Ni, which is directly formed on the soft magnetic underlayer, and a perpendicular magnetic recording layer formed on the non-magnetic intermediate layer, wherein in said soft magnetic underlayer, diffraction peaks 110, 200 and 211 of α-Fe appear on a thin film X-ray diffraction profile, which is measured by fixing an X-ray incident angle θ at 2 degrees, and the thickness of said non-magnetic amorphous intermediate layer is 2 nm or more and 20 nm or less, and said non-magnetic amorphous intermediate layer contains Ni and Zr.