The invention provides iron-based nano-crystalline soft
magnetic alloy, and belongs to the technical field of soft
magnetic alloy. The iron-based nano-crystalline soft
magnetic alloy is characterized in that a
chemical formula of the iron-based nano-crystalline soft magnetic
alloy is FeSiB<c>Cu<d>T<e>RE<f>, and the T represents at least one of Ti, V, Mn, Cr, Mo, Nb, Zr and W, and the RE represents one or two of La, Y, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho and Er; the a, the b, the c, the d, the e and the f represent atomic percentages of corresponding components, the b ranges from 12 to 16, the c ranges from 4 to 7, the d ranges from 0.5 to 1, the e ranges from 1 to 4, the f ranges from 0.5 to 2, and the a meets an equation of (100-b-c-d-e-f-g). The iron-based nano-crystalline soft magnetic
alloy has the advantages that a saturated
magnetostriction coefficient of the iron-based nano-crystalline soft magnetic
alloy is close to zero, and the iron-based nano-crystalline soft magnetic alloy is high in magnetic permeability and saturated magnetic induction intensity, and can replace
cobalt-based amorphous alloy to be applied to the field of manufacture for magnetic cores of precision electronic components.