Magnetostriction and hysteresis of oriented TbDyHoFe 1.95 alloy

Abstract

(Tb 0.36Dy 0.64) 1- x Ho x Fe 1.95 magnetostrictive alloys with >110< orientation were prepared by zone melting directionally solidified method. The magnetostrictive performance and hysteresis of >110< aligned polycrystalline (Tb 0.36Dy 0 64) 1- x Ho x Fe 1.95 were investigated under applied magnetic field H (0>H>4 kOe) in the temperature range from −60 to 80 °C with 0, 5 and 10 MPa pre-stress. The (Tb 0.36Dy 0.64) 1- x Ho x Fe 1.95 alloys ( x>0.3) have the character of giant magnetostriction from −60 to 80 °C. An obvious magnetostrictive “jump” effect was observed in these samples from −60 to 80 °C. The pre-stress and temperature dependence of the W h was also examined. Between the temperature range from −60 to 80 °C, the magnetostriction increased with temperature decreased, while the magnetostriction hysteresis decreased, with the pre-stress increased, but the magnetostriction and the magnetostrictive hysteresis increased.