Patent ID: 6541125
Filing Date: 2003-04-01
Classification: G11B,Y10S,Y10T

Abstract:
A magnetic recording medium comprising:a substrate; an underlayer provided on the substrate; a Co alloy magnetic film formed on the underlayer; and a protective film for protecting said magnetic film, wherein said underlayer includes a lower underlayer and an upper underlayer, said upper underlayer is 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, Ge, C, P, V, Nb, Mn, and Pd, said lower underlayer includes a material having a body-centered cubic 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 5.0 atomic % and not larger than 30 atomic %.