PERPENDICULAR RECORDING MEDIUM HAVING RECORDING LAYER WITH CONTROLLED PROPERTY AND METHOD OF MANUFACTURING SAME

摘要

PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium with a recording layer with controlled properties, and a method of manufacturing the same. SOLUTION: The perpendicular magnetic recording medium includes: a lower structure; and a recording layer formed on the lower structure, wherein the recording layer has a factor 2πiMr2/K1 of 0.5 or less and a factor 4πMr/Hc of 0.8 or less where Mr denotes a remnant magnetization, K1 denotes a perpendicular magnetic anisotropy energy constant, and Hc denotes a coercive force. Accordingly, even though grain boundaries between grains that constitute the recording layer are somewhat non-uniform in width, the grains can have almost the same nucleation field. As a result, the perpendicular magnetic recording medium can ensure high recording density and stability of recorded information. COPYRIGHT: (C)2007,JPO&INPIT