Magnetostriction Increase of Tb_0.3Dy_0.7Fe_1.95 Alloy Prepared by Solidification in High Magnetic Fields

Tb_0.3Dy_0.7Fe_1.95 alloys are solidified under various high magnetic field conditions. The influence of a high magnetic field on the crystal orientation, morphology and magnetostriction of the alloys are studied. The results show that with the increase of magnetic flux density, the crystal orientation of the (Tb,Dy)Fe₂ phase changed from <113> to <111> direction; the grains in the alloys tended to align along the magnetic field direction; and the magnetostriction of Tb_0.3Dy_0.7Fe_1.95 alloys is remarkably improved. The change in magnetostriction of Tb_0.3Dy_0.7Fe_1.95 alloys is linked to the amount and the crystal orientation behavior of the (Tb,Dy)Fe₂ phase.