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A soft magnetic alloy including a composition having a formula of ((Fe(1-(α+β))X1αX2β)(1-(a+b+c+d+e))MaBbPcCrdCue)1-fCf. X1 is one or more elements selected from a group of Co and Ni. X2 is one or more elements selected from a group of W, Al, Mn, Ag, Zn, Sn, As, Sb, Bi, N, O, and rare earth elements. M is one or more elements selected from a group of Nb, Hf, Zr, Ta, Ti, Mo, and V. 0.030≤a≤0.14, 0.028≤b≤0.20, 0
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