強磁性体の磁気ひずみ, 磁化曲線の応力依存性

概要

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In ferromagnetic materials, magnetic properties such as the magnetotriction and the magnetization curve depend on the applied stress as well as the relative orientation of the stress and the magnetic fields due to the magnetoelastic interactions. The authors have studied stress dependence of the magnetostriction and the magnetization curve from the constitutive equations of the stress and the magnetization process of soft ferromagnetic materials. The material is assumed to be isotropic in the natural state, i.e. in the absence of the magnetic field and the stress, and undergo a thermodynamically reversible process, so that the effects of hysteresis can be neglected. It is shown that the theoretical results calculated from an appropriate choice of the material parameters in the internal energy density are in excellent agreement with the experimental data of low carbon steel (SM490A) and pure Ni.
1998-08-25