Magnetic recording medium

A magnetic recording medium comprising a substrate having thereon an in-plane magnetic film underlayer, an in-plane magnetic film having a magnetic easy axis oriented in the in-plane direction with respect to the substrate and a vertical magnetic film having a magnetic easy axis oriented perpendicularly to the substrate,

• said in-plane magnetic film underlayer disposed at the substrate side of said in-plane magnetic film,
• said in-plane magnetic film being disposed closer to the substrate than said vertical magnetic film,
• a separation film being disposed between said in-plane magnetic film and said vertical magnetic film, said separation film containing one or more of Ta, Re, CuTi, SiC, W, NiP, Zr, Ti and C as a main component, and
• said vertical magnetic film containing a Co alloy consisting of from 16 to 30 at % of Cr, from 0 to 15 at % of Pt, from 2 to 10 at % of Ta, from 0 to 5 at % of Zr and the balance of Co, as a main component.

A magnetic recording medium comprising a substrate having thereon an in-plane magnetic film underlayer, an in-plane magnetic film having a magnetic easy axis oriented in the in-plane direction with respect to the substrate, a separation film comprising a material capable of growing non-epitaxially to the in-plane magnetic film, a nonmagnetic intermediate layer having an hcp structure and a vertical magnetic film having a magnetic easy axis oriented perpendicularly to the substrate,

• said in-plane magnetic film underlayer disposed at the substrate side of said in-plane magnetic film,
• said separation film being disposed between said in-plane magnetic film and said vertical magnetic film,
• said nonmagnetic intermediate layer containing a Co alloy consisting of from 25 to 50 at % of Cr, from 0 to 15 at % of Pt, from 0 to 10 at % of Ta, Zr, Cu and Re, and the balance of Co, as a main component, and
• said vertical magnetic film containing a Co alloy consisting of from 16 to 30 at % of Cr, from 0 to 15 at % of Pt, from 2 to 10 at % of Ta, from 0 to 5 at % of Zr and the balance of Co, as a main component.