Magnetic recording medium

Abstract

An object of the present technology is to provide a magnetic recording medium with enhanced reliability during traveling, the magnetic recording medium being configured to correct its width variations by adjusting the angle of a recording/reproducing head of a drive even in a case of storing or traveling in a high-temperature environment. The present technology provides a magnetic recording medium including a magnetic layer, an underlayer, and a base layer in this order, in which the underlayer contains a chlorine-containing binder, a portion where a chlorine count is greater than or equal to the following threshold in the underlayer has a thickness of 130 nm or less, and an average width variation of the magnetic recording medium before and after the magnetic recording medium is left for 40 hours in an environment with a temperature of 50° C. and a relative humidity of 40% RH with a tension of 0.55 N applied in a longitudinal direction is less than or equal to 170 ppm. [Threshhold]=[Average chlorine count in the underlayer]+6×[Standard deviation obtaind in calculating the average chlorine count]

Dependencies are inferred from the claim text.