Abstract
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 〈1 1 1〉-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 〈1 1 2〉-oriented and 〈1 1 0〉-oriented single crystal are very close under lower compressive prestress, while the 〈1 1 0〉-oriented ones have higher magnetostriction than 〈1 1 2〉-oriented ones under higher compressive prestress. In lower magnetic field, 〈1 1 0〉-oriented crystals achieve jump effect (1018 ppm at 715 Oe under 10 MPa) prior to 〈1 1 2〉-oriented ones, which indicates that it has fairly better low-magnetic field properties. These results agree well with the experimental results in previous literatures.
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