Magnetic recording medium

摘要

In a magnetic recording disk of a double-sided data recording type according to a perpendicular magnetic recording technique of the invention, recording layers having different film thicknesses are formed on two surfaces of a base layer. The film thickness of one magnetic recording layer is set to be larger than the film thickness of the other magnetic recording layer, thereby preventing a curl phenomenon. In addition, a coercive force of the thicker recording layer is set to be smaller than that of the thinner layer. Thus, differences in a reproduction output voltage and an optimal recording current between the two recording layers of the disk due to a film thickness difference can be compensated for.