Abstract
Electromagnetic wave absorbing properties of composite sheets using Ar gas atomized and attrition milled powders of several soft magnetic compositions were examined. The sheet of Fe-50Ni powders whose aspect ratio was the largest of all tested materials showed the maximum u" value, and the sheet of Fe-6Si powders whose average particle size was the minimum showed the maximum frequency of μ" maximum. Concerning the flattening behavior of the atomized powders which was confirmed to relate with the mechanical properties of the materials, the larger aspect ratio could be obtained for the softer material, and the larger average particle size could be obtained for the material of the larger maximum elongation.
