Fluorine-containing carboxylic acid amine salt and a magnetic recording medium with the same thereon

A magnetic recording medium comprising a base material film disposed thereon with a ferromagnetic film and a lubricant layer disposed either directly or via a protection film on top of said ferromagnetic film, wherein said lubricant layer comprises one or more fluorine-containing carboxylic acid amine salt of Formula 4, ##STR12## wherein R.sup.1 denotes an aliphatic alkyl group with 6 to 30 carbons or an aliphatic alkenyl group with 6 to 30 carbons;

• R.sup.2 denotes a group selected from the group consisting of a fluoroalkyl group with 3 to 30 carbons, a fluoroalkenyl group with 3 to 30 carbons, a fluorophenyl group with 6 to 18 carbons, and a fluoroalkylether group with 5 to 50 carbons;
• R.sup.3 and R.sup.4 each denotes a saturated or unsaturated hydrocarbon chain with 1 to 20 carbons;
• R.sup.5 denotes either a fluoroalkyl group with 3 to 30 carbons or a fluoroalkenyl group with 3 to 30 carbons;
• n denotes 0 or 1;
• X denotes hydrogen or -(R.sup.6)-R.sup.7 ;
• and Y denotes hydrogen or -(R.sup.8)-R.sup.9, where R.sup.6 and R.sup.8 each denotes a saturated or unsaturated hydrocarbon chain with 1 to 20 carbons, and R.sup.7 and R.sup.9 each denotes a fluoroalkyl group with 3 to 30 carbons or a fluoroalkenyl group with 3 to 30 carbons.