| abstract |
A lubricant comprising a multifunctional ammonium carboxylate represented by the general formula (1) and a magnetic recording medium comprising a non-magnetic support having a magnetic layer thereon, on the top of which a protective film is formed, wherein the lubricant is coated on the medium to form a lubricant film. <IMAGE> (1) where n is an integer of 2 to 4, Rf represents a non-branched, linear perfluoropolyether chain having an average molecular weight of 3000 to 10000, R1 and R2 represent hydrogen or an alkyl group, and R represents an organic group of two to four valences having one or more aromatic rings. |