| abstract |
Disclosed is a magnetic disk that has excellent durability, particularly excellent LUL durability, and excellent alumina resistance and has a high level of reliability under a low flying height of a magnetic head involved in a recent tendency toward a rapid increase in recording density and a very severe environment resistance requirement due to diversified applications. A magnetic disk ( 10 ) comprises a substrate ( 1 ) and at least a magnetic layer ( 6 ), a carbon-based protective layer ( 7 ), and a lubricating layer ( 8 ) provided in that order over the substrate ( 1 ). The lubricating layer ( 8 ) contains a compound that has a perfluoropolyether main chain in the structure thereof and has an aromatic group and a polar group at the end of the molecule. |