Patent ID: 6942933

Claim:
A magnetic recording medium comprising a non-magnetic substrate, a non-magnetic undercoat layer, a magnetic layer, and a protective film, the layers and film being successively formed on the substrate, wherein the non-magnetic undercoat layer has a multi-layer structure formed of at least two layers and contains a layer A formed of a material selected from the group consisting of a Cr—Ta[[-based]] alloy, a Cr—Nb[[-based]] alloy, a Cr—Ti[[-based]] alloy, a Cr—Zr[[-based]] alloy, and a Cr—Hf[[-based]] alloy, and a layer B formed of a material selected from the group consisting of a Co—W[[-based]] alloy, a Co—W—B[[-based]] alloy, a Co—Mo[[-based]] alloy, a Co—Mo—B[[-based]] alloy, a Co—W—Mo[[-based]] alloy, and a Co—W—Mo—B[[-based]] alloy, in which the layers A and B are provided in this order from the non-magnetic substrate.