Skip to Main Content
Magnetostrictive properties of (Tb0.5Dy0.5)1-xRExFe1.9 (x=0-0.05, RE=Y, Ce, Sm, Gd, Ho, Yb) polycrystalline compounds were studied. Each rare-earth element formed a RE-Fe2 Laves compound with a different lattice spacing. Corresponding to this difference, (Tb0.5Dy0.5)0.95RE0.05Fe1.9 alloys showed a variation in lattice spacing as a result of the substitution of rare-earth elements and the prestress dependence of magnetostriction changed noticeably. In the case of Y, Sm, and Gd substitution, which showed greater lattice spacing than that of the Tb0.5Dy0.5Fe1.9 alloy, the prestress dependence and maximum magnetostriction decreased. On the other hand, in the case of Ce, Ho, and Yb substitution, which showed a decrease in lattice spacing, the conspicuous prestress dependence was the same as that of the Tb0.5Dy0.5Fe1.9 alloy and the maximum magnetostriction was greater than that of the latter alloy.