| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS [0020] The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: [0021]FIG. 1 shows the layer structure of a conventional perpendicular magnetic recording medium with a single magnetic layer; [0022]FIG. 2 shows the layer stru
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