Effects of magnetocrystalline anisotropy constant $K2$ on magnetization and magnetostriction of Terfenol-D

Magnetocrystalline anisotropy constant $K2$ is found to produce significant effects on the magnetization and magnetostriction behaviors of Terfenol-D crystals through magnetic domain rotation mechanism. Such effects have often been neglected in previous studies. Considering different values of $K2$ in the magnetization rotation of $⟨111⟩$ easy-direction domains under external magnetic field and compressive uniaxial stress applied along $[1¯1¯2]$ direction, it is shown that a change in $K2$ causes significant changes in both magnetization and magnetostriction curves. Therefore, $K2$ is an important parameter that must be considered in magnetoelastic behaviors of Terfenol-D.