Lubricant, magnetic recording medium and production method of magnetic recording medium

A lubricant comprising at least one compound selected from fluorine-based diester dicarboxylic acid compounds represented by a formula (a), and at least one compound selected from fluorine-based diester compounds represented by a formula (b) and fluorine-based monoester compounds represented by a formula (c):

• wherein, R1, R2, R3 and R4 each represent hydrogen, an aliphatic alkyl group or an aliphatic alkenyl group, at least one of R1 and R2 is hydrogen, at least one of R3 and R4 is hydrogen, “m” is an integer of 1 to 6, “n” is an integer of 1 to 5, “p” and “q” each are an integer of 0 to 30 and “r” is an integer of 1 to 12;
• wherein, R5 and R6 each represent an aliphatic alkyl group or an aliphatic alkenyl group, “x” is an integer of 1 to 6, “y” is an integer of 1 to 5, “s” and “t” each are an integer of 0 to 30 and “u” is an integer of 1 to 12;
• wherein, R7 represents a fluoroalkyl group, a fluoroalkenyl group, a fluoroether group or a fluoropolyether group, R8 represents an aliphatic alkyl group or an aliphatic alkenyl group, and “a” is an integer of 1 to 12.