Patent ID: 7252897

Claim:
A magnetic recording disk comprising a substrate, a magnetic layer formed on the substrate, a protective layer formed on the magnetic layer and a two part lubricant layer formed on the protective layer, a first lubricant layer containing a perfluoropolyether compound having an end moiety containing a hydroxyl group on the protective layer side and a second lubricant layer containing a perfluoropolyether compound having an end moiety containing a phosphazene ring on the first lubricant layer, wherein said perfluoropolyether compound having an end moiety containing a hydroxyl group is a compound having a structure of the general formula (IV), wherein each of r and s is an integer of 1 or greater, and said perfluoropolyether compound having an end moiety containing a phosphazene ring is a compound having a structure of the general formula (I), R 1 —OCH 2 CF 2 (OCF 2 CF 2 ) p (OCF 2 ) q OCF 2 CH 2 O—R 2 (I) wherein R 1 is a group represented by the formula (A), R 2 is a hydrogen atom or a group of the above formula (A), and each of p and q is an integer of 1 or greater.