The Anisotropy of ΔE Effect of Fe-Ga Single Crystal

An extended model based on the Jiles-Thoekle and Armstrong model is used to model the anisotropy of Delta E effect of the Fe-Ga single crystal. Some specific crystallographic directions which are [100], [110], [111], and [112] directions are selected to study the magnetomechanical behavior under magnetic field and stress loading. The strain-stress curves and Young's modulus-stress curves are simulated. Two more cases of direction selection [theta is an element of(0, pi), phi = pi/4, and theta = pi/2, phi is an element of(0, 2 pi)] are used to study the relationship between Delta E effect and crystallographic direction, which shows that the directions showing minimum saturated magnetostriction and maximum pure elastic modulus along the two routes have an abnormal change trend of the Delta E effect. The results show that the Delta E effect of the Fe-Ga single crystal has a high degree of anisotropy. Both the atomic packing density and the domain motion have great effect on the final magnetomechanical coupling behavior.