Giant magnetostriction materials from cryogenic temperatures to 250 C

Huge magnetoelastic interactions in the rare earths Tb, Dy, and Sm provide the basis of a technically important class of magnetostrictive materials with saturation strains, 10-3 > (lambda) 100, and (3) changes in the magnetic easy axes from (low magnetostrictive) to (giant magnetostrictive) with temperature. Magnetostrictions > 10-3 are found as high as 150 degree(s)C in Tb.27Dy.73Fe2 and 250 degree(s)C in TbFe2.