2025年1月17日，博士生陈莹同学的1篇论文“Magnetic heat-treatment induced uniaxial magnetic anisotropy and dynamic precipitation in Fe-Ga magnetostrictive alloys” 被Materials and Solidification录用。Materials and Solidification是由西北工业大学凝固技术国家重点实验室主办的材料和凝固领域新刊物，这篇论文为创刊第一期录用的论文之一。祝贺她！

Abstract：

Introducing coherent tetragonal nanoprecipitates into cubic matrix has recently been found to significantly enhance magnetostriction of Fe-based alloys. Combining this novel strategy with conventional approach, such as introducing uniaxial magnetic anisotropy (making uniaxial alignment of magnetic domains), may allow better magnetostriction performance. Based on this consideration, here a large-magnetostriction alloy Fe₇₃Ga₂₇ (at.%) was subjected to magnetic heat-treatment, aiming to introducing uniaxial anisotropy and nanoprecipitates simultaneously. The results showed that strong uniaxial magnetic anisotropy (well-aligned magnetic domains) is induced together with the formation of dense nanoprecipitates, hence improving the magnetostriction from 65 ppm for the solution-treated counterpart to 140 ppm by 115%. However, such magnetostriction enhancement effect is weaker than that observed in the sample subjected to heat-treating for the same time at the same temperature in the absence of magnetic field. Further microstructural investigations revealed that the magnetic heat-treatment leads to dynamic precipitation, forming coarser and incoherent tetragonal nanoprecipitates and even face-centered-cubic equilibrium phase with intrinsic negative magnetostriction when compared with the isothermal annealing condition. These results suggested that magnetic field provides extra driving force to accelerate precipitation kinetics, and the magnetic annealing condition should be carefully controlled to inhibit the over-growth of tetragonal nanoprecipitates towards enhancing magnetostriction performance.