Possible Martensitic Transformation in Heusler Alloy Pt2MnSn from First Principles

被引:0
作者
Feng, Lin [1 ]
Guo, Chen-Chen [1 ]
Zhang, Xue-Ying [1 ]
Xuan, Hai-Cheng [1 ]
Wang, Wen-Hong [2 ]
Liu, En-Ke [2 ]
Wu, Guang-Heng [2 ]
机构
[1] Taiyuan Univ Technol, Dept Phys, Taiyuan 030024, Shanxi, Peoples R China
[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, State Key Lab Magnetism, Beijing 100190, Peoples R China
基金
美国国家科学基金会; 中国国家自然科学基金;
关键词
SHAPE-MEMORY ALLOYS; ELECTRONIC-STRUCTURE; PHASE-STABILITY; GA;
D O I
10.1088/0256-307X/35/3/038101
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Using density functional theory calculations, we investigate the tetragonal distortion, electronic structure and magnetic property of Pt2MnSn. The results indicate that, when the volume-conserving tetragonal distortion occurs, the energy minimum appears at c/a = 0.84, and the energy difference between the minimum and cubic phase is as high as 107 meV/f.u. Thus from the point of view of thermodynamics, martensitic transformation may occur in Pt2MnSn with decreasing the temperature. The electronic structure of its cubic and martensitic phases also approves this. Moreover, both the cubic and tetragonal phases of Pt2MnSn are ferromagnetic structures and their total magnetic moments are 4.26 mu(B) and 4.12 mu(B), respectively.
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页数:4
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