中国物理B ›› 2015, Vol. 24 ›› Issue (12): 126201-126201.doi: 10.1088/1674-1056/24/12/126201

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Electronic structures and magnetisms of the Co2TiSb1-xSnx (x=0, 0.25, 0.5) Heusler alloys: A theoretical study of the shape-memory behavior

王立英a b, 代学芳b, 王啸天b, 林婷婷a, 陈磊a, 刘然a, 崔玉亭a, 刘国栋a b   

  1. a School of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 400044, China;
    b School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
  • 收稿日期:2015-05-05 修回日期:2015-08-16 出版日期:2015-12-05 发布日期:2015-12-05
  • 通讯作者: Liu Guo-Dong E-mail:gdliu1978@126.com
  • 基金资助:
    Project supported by the Chongqing City Funds for Distinguished Young Scientists, China (Grant No. cstc2014jcyjjq50003), the Basic and Frontier Research Project of Chongqing City, China (Grant No. cstc2013jjB50001), the Project of Chongqing Normal University, China (Grant No. 13XLB030), and the Project of Scientific Research for High Level Talent in Colleges and Universities of Hebei Province, China (Grant No. GCC2014042).

Electronic structures and magnetisms of the Co2TiSb1-xSnx (x=0, 0.25, 0.5) Heusler alloys: A theoretical study of the shape-memory behavior

Wang Li-Ying (王立英)a b, Dai Xue-Fang (代学芳)b, Wang Xiao-Tian (王啸天)b, Lin Ting-Ting (林婷婷)a, Chen Lei (陈磊)a, Liu Ran (刘然)a, Cui Yu-Ting (崔玉亭)a, Liu Guo-Dong (刘国栋)a b   

  1. a School of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 400044, China;
    b School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
  • Received:2015-05-05 Revised:2015-08-16 Online:2015-12-05 Published:2015-12-05
  • Contact: Liu Guo-Dong E-mail:gdliu1978@126.com
  • Supported by:
    Project supported by the Chongqing City Funds for Distinguished Young Scientists, China (Grant No. cstc2014jcyjjq50003), the Basic and Frontier Research Project of Chongqing City, China (Grant No. cstc2013jjB50001), the Project of Chongqing Normal University, China (Grant No. 13XLB030), and the Project of Scientific Research for High Level Talent in Colleges and Universities of Hebei Province, China (Grant No. GCC2014042).

摘要: The total energy, electronic structures, and magnetisms of the AlCu2Mn-type Co2TiSb1-xSnx (x=0, 0.25, 0.5) with the different lattice parameter ratios of c/a are studied by using the first-principles calculations. It is found that the phase transformation from the cubic to the tetragonal structure lowers the total energy, indicating that the martensitic phase is more stable and that a phase transition from austenite to martensite may happen at a lower temperature. Thus, a ferromagnetic shape memory effect can be expected to occur in these alloys. The AlCu2Mn-type Co2TiSb1-xSnx (x=0, 0.25, 0.5) alloys are weak ferrimagnets in the austenitic phase and martensitic phase.

关键词: Heusler alloy, martensitic transformation, ferromagnetic shape memory alloy

Abstract: The total energy, electronic structures, and magnetisms of the AlCu2Mn-type Co2TiSb1-xSnx (x=0, 0.25, 0.5) with the different lattice parameter ratios of c/a are studied by using the first-principles calculations. It is found that the phase transformation from the cubic to the tetragonal structure lowers the total energy, indicating that the martensitic phase is more stable and that a phase transition from austenite to martensite may happen at a lower temperature. Thus, a ferromagnetic shape memory effect can be expected to occur in these alloys. The AlCu2Mn-type Co2TiSb1-xSnx (x=0, 0.25, 0.5) alloys are weak ferrimagnets in the austenitic phase and martensitic phase.

Key words: Heusler alloy, martensitic transformation, ferromagnetic shape memory alloy

中图分类号:  (Shape-memory effect; yield stress; superelasticity)

  • 62.20.fg
63.20.dk (First-principles theory) 31.10.+z (Theory of electronic structure, electronic transitions, and chemical binding)