Model of Magnetostriction and Magnetization for Galfenol Rods with Considering the Effects of Anisotropy and Dynamic Losses

摘要

The model of magnetostriction and magnetization for Galfenol is established with considering the anisotropy and dynamic losses, based on the theory of free energy, Jiles-Atherton model and Stoner-Wohlfarth model. The magnetostriction (λ-H) and magnetization (M-H) for Galfenol rods under different magnetic fields and stresses have been calculated by the constitutive model. The measurement of magnetic properties for Galfenol rod specimen is made by the WK-22 magnetic parameter measurement system. The calculated and experimental results match very well. It means that the proposed model can effectively describe the effects of anisotropy, stress and dynamic losses on the magnetostriction and magnetization of Galfenol rods.