The soft magnetic alloy and magnetic parts

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[A] has a low coercive force and a high saturation flux density soft magnetic alloy or the like having improved surface properties. [Solution] formula (Fe(1 - (Α + β)) X1α X2β )(1 - (A + b + c + d + e + f + g)) Ma Bb Pc Sid Ce Sf Tig Soft magnetic alloy consisting mainly made. X1 is selected from the group consisting of Ni and is more Co 1, X2 is Al, Mn, Ag, Zn, Sn, As, Sb, cu, Cr, Bi, N, O and a rare earth element is selected from the group consisting 1 or more, the Nb M, Hf, Zr, Ta, Mo, V and W are selected from the group consisting of one or more 1. 0.020 ≦ a ≦ 0.14, 0.020 [b ≦ 0.20, 0 ≦ d ≦ 0.060, 0 ≦ f ≦ 0.010, 0 ≦ g ≦ 0.0010, α ≧0, β ≧0, with 0 ≦ α + β ≦ 0.50. At least one of f and g is greater than 0 or more. C and e and is within a predetermined range. Fe-based nanocrystal nano- hetero structure or having a structure. Figure 1 [drawing]