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A Nonlinear Magnetoelastic Energy Model and Its Application in Domain Wall Velocity Prediction
Li-Bo Wu1,2, Yu-Feng Fan2, Feng-Bo Sun3
1Department of Mechanics, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China.
Abstract:
In this letter, we propose a nonlinear Magnetoelastic Energy (ME) with a material parameter related to electron interactions. An attenuating term is contained in the formula of the proposed nonlinear ME, which can predict the variation in the anisotropic magneto-crystalline constants induced by external stress more accurately than the classical linear ME. The domain wall velocity under stress and magnetic field can be predicted accurately based on the nonlinear ME. The proposed nonlinear ME model is concise and easy to use. It is important in sensor analysis and production, magneto-acoustic coupling motivation, magnetoelastic excitation, etc.
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