Magnetization and magnetostriction of dendritic [112] TbxDyyHozFe1.95 (x+y+z=1) rods under compressive stress

The field dependencies of the magnetization and magnetostriction of the Laves phase pseudobinary TbxDyyHozFe1.95 (x+y+z=1) compounds were measured as a function of compressive stress T (10 MPa<|T|<70 MPa) and applied magnetic field H (0<H<135 kA/m). Values of x, y, and z were chosen to obtain minimum magnetic anisotropy and easy magnetization axis rotation near room temperature. At a compressive stress of 34 MPa, the addition of Ho to the binary Tb1−xDyxFe1.95 compound reduced the width of the strain versus magnetic field hysteresis curves in Tb0.28Dy0.57Ho0.15Fe1.95 and Tb0.26Dy0.54Ho0.2Fe1.95 by 23% and 54%, respectively, compared to the original alloy, while the strains were reduced by only 7% and 10%.