Sb含量对Ni46Mn41In13-xSbx结构、相变和磁性的影响

系统地研究了铁磁形状记忆合金Ni_(46)Mn_(41)In_(13-x)Sb_x(x=0,2,4,6,8,10,12,13)的结构、相变和磁性能.研究表明:系列合金仍然为L21立方结构,原子排列有序度有所提高.居里温度和马氏体逆相变温度在x6时均随x的增大而逐渐降低;在x6时均随x的增大而逐渐升高.磁化强度-温度曲线显示,Sb对In的替代引起主族元素p轨道和过渡族金属d轨道之间p-d轨道杂化作用改变,导致Ni_(46)Mn_(41)In_(13-x)Sb_x奥氏体和马氏体磁化强度变化趋势随Sb含量的增加出现反转.

Influences of Sb content on the structure, phase transition and magnetism of Ni46Mn41In13-xSbx alloys

The structure, phase transition and magnetism of Ni46Mn41In13-xSbx (x=0, 2, 4, 6, 8, 10, 12, 13) alloys have been systematically studied in this paper. The results demonstrate that the arc-melting samples display pure L21-type and atoms are arranged more orderly. Curie temperature and martensitic inverse transformation temperature reduce at x<6 and increase at x>6 gradually with increasing x. The magnetization-temperature curves indicate that substitution of In by Sb has a significant influence on the p-d hybridization interaction between p orbitals of main group element and d orbitals of transition metals, leading to a reverse trend of the magnetization of austenite and martensite with the increasing Sb content.