Fe-Ga(Al)合金作为新一代磁性功能材料，已发现其在磁致伸缩效应和威德曼效应两方面表现出优异性能，本课题旨在探索在磁场和应力场的共同作用对磁致伸缩的影响，以及在磁场和应力场下的磁能和机械能的转换规律。将研究磁致伸缩和威德曼扭转的"jump"效应，分析在磁机械耦合过程中的能量转化方式，能量存储和能量释放是否可逆，引发磁畴的重新分布路经是否可重复，以及如何表征这种能量转化过程，找寻能量转化的规律。通过制备单晶、多晶、取向多晶、织构Fe-Ga (Al)合金以及改变热处理工艺条件，探索材料的组织结构对磁-机械能转换的影响。建立模型模拟磁畴的转动路径，绘制能量曲面，为进一步开拓磁致伸缩器件的应用提供理论基础，在Fe-Ga(Al)合金材料的利用和器件开发设计中起指导作用。

Fe-Ga(Al) alloys, as a new generation of magnetic functional materials, exhibit outstanding performance in magnetostrictive effect and the Wiedemann effect. This research based on the Fe-Ga(Al) alloys aims to investigate the magnetostrictive effect under the coupling of magnetic field and stress field, to discover the conversion rule between the magnetic energy and mechanical energy. The "jump" effect of magnetostriction and Wiedemann effect will be studied. We focus on the energy conversion mode and whether the storage and energy release is reversible. Our team will analyze whether the path caused by the rotation of the domain is reversible and how to characterize the energy conversion process and find the rule of the energy conversion. We will also investigate the effect of materials structure on magnetic - mechanical energy conversion through preparing single crystal, polycrystalline, orientation polycrystalline, textured Fe-Ga(Al) alloy and changing heat treatment conditions. Put forward a mode to simulate the rotation path of domain and plot the energy curve surface. In a word, this research will play a guiding role in making and designing magnetostrictive devices and provide the theoretic basis for the further application of the magnetostrictive devices.