中文摘要：

在单晶Ni54Fe19，Ga27中掺入少量Mn，对增强磁交换相互作用，提高居里温度和稳定了B2相并增强晶格的刚度，起到了非常明显的作用．Mn的存在使样品中取向内应力得以保持，提高了变体择优取向的水平，大大提高了单晶的相变应变和磁场增强作用．发现内应力对超弹性性质的影响也很明显．

英文摘要：

Light doping of Mn in Ni54 Fe19Ga27 plays a significant role in enhancing the magnetic exchange interaction and the rigidity of crystal lattice, it also increases the Curie temperature and stabilizes B2 phase of the material. The oriented internal stress in the single crystals improves the reorientation of the variants due to the existence of Mn. This greatly increases the shape memory deformation and the magnetic field-controlled strain. The internal stress also has an obvious effect on the superelastic behaviors.