Magnetostriction of Tb-Dy-Fe alloy with different crystal axes orientation

Based on the principle of energy minimum, magnetostriction of Tb-Dy-Fe alloy with different crystal axes under different compressive stress has been calculated using a three-dimensional anisotropy domain rotation model. Simulated results show that the magnetostriction property of 〈111〉-oriented single crystal is the best; saturation magnetostriction up to 2378 ppm has been obtained under compressive prestress of 24 MPa, which is very close to the experiment results. Saturation magnetostriction properties of 〈112〉-oriented and 〈110〉-oriented single crystal are very close under lower compressive prestress, while the 〈110〉-oriented ones have higher magnetostriction than 〈112〉-oriented ones under higher compressive prestress. In lower magnetic field, 〈110〉-oriented crystals achieve jump effect (1018 ppm at 715 Oe under 10 MPa) prior to 〈112〉-oriented ones, which indicates that it has fairly better low-magnetic field properties. These results agree well with the experimental results in previous literatures.