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特許 権利維持 A soft magnetic alloy obtained by preparing a Fe-based alloy composition molten, followed by rapidly cooling the Fe-based alloy composition to solidify it, wherein the Fe-based alloy composition comprises Fe of 70 at% or more, B of 5 to 25 at% (both inclusive), Cu of 15 or less (but 0 not inclusive) at%, and P of 10 or less (but 0 not inclusive).