Planar magnetic element, and an antenna for a radio wave absorber and soft magnetic alloy using the

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PROBLEM TO BE SOLVED : To provide a soft magnetic alloy having high specific resistivity required of magnetic material for high frequency use, etc., and increased in magnetic permeability in a high frequency band and also to provide flat magnetic device, antenna, and wave absorber which are produced by using the soft magnetic alloy. SOLUTION : This alloy is constituted essentially of crystalline phases of =2 elements T selected from the group consisting of Fe, Ni, Pd, Mn, and Al. Further, the amorphous phases have a composition containing one or >=2 elements M selected from the group consisting of Ti, Zr, Hf, Nb, Ta, Mo, W, and rare earth elements, O, at least one or more kinds among the oxides of the elements M, Fe, and the elements T.