PERPENDICULAR MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium which is improved so as to be suitable for high-density magnetic recording and a magnetic storage device using this medium. SOLUTION: The backing magnetic film of a two-layer perpendicular medium is made to have two or more layers so that one of these layers is used as a keeper layer 17 for keeping the perpendicular magnetization and the others are used as the layers 13, 15 for increasing the recording efficiency of a recording head by separating the functions of the medium. The generation of noise is reduced by regulating the magnetization direction of soft magnetic film other than the keeper layer to the peripheral direction of a disk.