(57) Fe-based soft magnetic alloy having excellent soft magnetic characteristics with
high saturated magnetic flux density, characterized in that it has fine crystal grains
and is expressed by the general formula:
Fe100-a-b-c-d Ma M′b Yc Nd (I)
where M is at least one element from the following: Cu, Ag, Au, Zn, Sn, Pb, Sb, and
Bi;
M′ is at least one element from the following: Groups IVa, Va, VIa of the periodic
table, Mn, Co, Ni, and Al;
Y is at least one of the following: Si, P, or B,
and wherein "a", "b", "c" and "d" expressed in atomic % are as follows:
0.01 ≦ a ≦ 5
0.1 ≦ b ≦ 10
15 ≦ c ≦ 28
0 < d ≦ 8.
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