PERPENDICULAR MAGNETIC RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium in which structure of a soft magnetic layer is improved. SOLUTION: The perpendicular magnetic recording medium includes: a substrate; a plurality of soft magnetic layers including a lower soft magnetic layer and an upper soft magnetic layer which are sequentially stacked on the substrate, the upper soft magnetic layer having an anisotropic magnetic field larger than that of the lower soft magnetic layer; an isolating layer interposed between the lower and upper soft magnetic layers and preventing magnetic interaction between the lower and upper soft magnetic layers; an underlayer formed on the upper soft magnetic layer; and a recording layer formed on the under layer, and including a plurality of ferromagnetic layers each of which has a magnetic anisotropic energy which decreases toward the upper ferromagnetic layer from the lower ferromagnetic layer positioned at the under layer. COPYRIGHT: (C)2009,JPO&INPIT