| 摘要 |
An object of this invention is to provide a magnetic recording medium in which its S/Nm (output/medium noise ratio) is improved. This magnetic recording medium is comprised of a first foundation layer made of alloy material composed of mainly Cr with added B, a second foundation layer made of alloy material in which Mo is mixed in Cr, an intermediate layer made of alloy material composed of mainly Co with added Cr and Ta, a lower magnetic layer and an upper magnetic layer made of alloy material composed of mainly Co with added Cr, Pt, B and a protective film composed of mainly C, these layers being formed in this order from the bottom.
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