| 摘要 |
Disclosed are a magnetic recording medium for a heat-assisted recording device which has a high SNR at high density and a manufacturing method thereof. The magnetic recording medium includes, in the order recited: a non-magnetic substrate; a magnetic recording layer; a protective layer; and a liquid lubricating layer. The magnetic recording layer has a granular structure formed by a magnetic portion and a non-magnetic portion that surrounds the magnetic portion, the non-magnetic portion having a volume percentage based on the total volume of the granular structure ranging from 15 vol % to 30 vol % and including a carbon-based material. The magnetic recording medium has a surface having an arithmetic mean roughness Ra and an average length of roughness curve elements RSm such that Ra/RSm ranges from 0.05 to 0.15. |
