Patent ID: 6383667
Filing Date: 2002-05-07
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium comprising:a substrate; an underlayer provided on the substrate; a Co alloy magnetic film formed through the underlayer; and a protective film for protecting said magnetic film, wherein said underlayer has a two-layer structure of a lower underlayer contacted with the substrate and an upper underlayer contacted with the Co alloy magnetic film, said upper underlayer consists of a Coâ€”Crxâ€”My alloy film having a hexagonal close-packed structure, where 25 atomic %&lE;x+y&lE;50 atomic %, 0.5 atomic %&lE;y, and nonmagnetic element M is an element selected from the group consisting of B, Si, Ge, C, P, V, Nb, Hf, Mn, Rh, Os, Ir, Re, Pd, and Pt, said lower underlayer includes a material having a B2 structure, and said magnetic film is made of Co alloy material of a hexagonal close-packed structure containing Pt by an amount not smaller than 5 atomic % and not larger than 30 atomic %.