Ni2In型六角MM’X铁磁马氏体相变材料及其研究进展

摘要

六角结构MM’X材料是一类潜在的新型磁相变功能材料。基于磁性马氏体相变，它们表现出优异的磁驱马氏体相变效应和磁热效应。介绍了MM’X材料的基本结构、磁性和研究历史，综述了近年来人们对其磁场响应性能的研究进展。阐述了人们在探索和提升代表性体系MnNiGe，MnCoGe的物理性能过程中的思想、方法和结果，重点探讨了人们对磁共结构耦合转变的调控和实现，尤其是顺磁一铁磁型马氏体相变所需要的居里温度窗口的构建。展望了MM’X材料潜在的磁性功能应用和优势。%The Ni2In-type hexagonal MM＇X alloys is a new kind of potential magnetic phase-transition functional materi- als. Based on the magnetic martensitic transformation, they exhibit excellent magnetic-field-induced martensitic transfor- mation and magnetocaloric effects. The structure, magnetism and research history of MM＇X alloys are introduced, and, the recent investigation progress of the magnetoresponsive properties are summarized. The ideas, methods and results dur- ing the exploration and improvement of the representative MnNiGe and MnCoGe systems are clarified. The tailoring and re- alizing of the magnetostructural transitions, especially the building of Curie temperature windows for paramagnetic-ferro- magnetic martensitic transformations, are intensively shown. An outlook for the potential applications and advantages of MM＇X alloys are also given.