Soft magnetic material and method for producing the same

A method for producing a soft magnetic material, comprising:

• providing an alloy having a composition represented by the following composition formula:
• Fe100-x-yBxNiy
• wherein x satisfies 10≤x≤16 in at %, y satisfies 0<y≤4 in at %, part of B may be replaced by at least one element selected from the group consisting of Si, P, and C, the replaced B is 3 at % or less based on an entire composition, part of Fe and part of Ni may be replaced by at least one element selected from Nb, Co, Zr, Hf, Cu, Ag, Au, Zn, Sn, As, Sb, Bi, Y, and rare earth elements, and the replaced Fe and Ni is 3 at % or less based on the entire composition,
• and having an amorphous phase;
• and
• heat-treating the alloy under conditions in which the alloy is heated at a heating rate of 10° C./s or more to a temperature region of {T1+0.88(T2−T1)} or more to less than T2, wherein T1 is an α-Fe crystal formation start temperature, and T2 is a Fe—B compound formation start temperature, and held in the temperature region for a holding time of 0 to 80 s.