Improved magnetostriction of Dy-doped Fe83Ga17 melt-spun ribbons

  (Fe0.83Ga0.17)100−xDyx (0 ⩽ x ⩽ 0.42) ribbons were made by the melt-spinning method. The increases in the lattice parameters Tc and Ms indicated the presence of Dy element solution in the A2 matrix. Dy-doped Fe83Ga17 ribbons showed a significant improvement in magnetostriction, which was the same effect of small additions of Tb in the Fe83Ga17 melt-spun ribbons. The maximum perpendicular magnetostriction λ⊥ in the direction of the ribbons length was −620 ppm for x = 0.25, which was three times larger than that of the binary Fe83Ga17 ribbon.