Patent ID: 6991686

Claim:
A method for producing a magnetostrictive material, comprising sintering a mixture composed of Starting Materials A, B and C, where Starting Material A is represented by Formula 1 (Tb x Dy 1-x )T y (T is at least one metallic element selected from the group consisting of Fe, Ni and Co, 0.35<x≦0.50 and 1.70≦y≦2.00), Starting Material B is represented by Formula 2 Dy t T 1-t (0.37≦t≦1.00) and Starting Material C contains said T, to produce a magnetostrictive material represented by Formula 3 (Tb v Dy 1-v )T w (0.27≦v<0.50, and 1.70≦w≦2.00), wherein the oxygen content of said Starting Material A is set at 500 to 3000 ppm and the oxygen content of said Starting Material B is from 2000 to 7000 ppm.