The Anisotropy of $\Delta E$ Effect of Fe–Ga Single Crystal

An extended model based on the Jiles-Thoekle and Armstrong model is used to model the anisotropy of ΔE 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 [8 ∈ (0, π), φ = π/4, and 8 = π/2, φ ∈ (0, 2π)] are used to study the relationship between ΔE 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 ΔE effect. The results show that the ΔE 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.