中国物理B ›› 2018, Vol. 27 ›› Issue (1): 16201-016201.doi: 10.1088/1674-1056/27/1/016201

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

First-principles calculations on elastic, magnetoelastic, and phonon properties of Ni2FeGa magnetic shape memory alloys

Wangqiang He(贺王强), Houbing Huang(黄厚兵), Zhuhong Liu(柳祝红), Xingqiao Ma(马星桥)   

  1. Department of Physics, University of Science and Technology Beijing, Beijing 100083, China
  • 收稿日期:2017-07-09 修回日期:2017-08-26 出版日期:2018-01-05 发布日期:2018-01-05
  • 通讯作者: Wangqiang He, Houbing Huang E-mail:hewangqiang@yeah.net;hbhuang@ustb.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11174030 and 11504020) and the Fundamental Research Funds for the Central Universities of China (Grant No. FRF-TP-16-064A1, 06500031).

First-principles calculations on elastic, magnetoelastic, and phonon properties of Ni2FeGa magnetic shape memory alloys

Wangqiang He(贺王强), Houbing Huang(黄厚兵), Zhuhong Liu(柳祝红), Xingqiao Ma(马星桥)   

  1. Department of Physics, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2017-07-09 Revised:2017-08-26 Online:2018-01-05 Published:2018-01-05
  • Contact: Wangqiang He, Houbing Huang E-mail:hewangqiang@yeah.net;hbhuang@ustb.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11174030 and 11504020) and the Fundamental Research Funds for the Central Universities of China (Grant No. FRF-TP-16-064A1, 06500031).

摘要:

The elastic, magnetoelastic, and phonon properties of Ni2 FeGa were investigated through first-principles calculations. The obtained elastic and phonon dispersion curves for the austenite and martensite phases agree well with available theoretical and experimental results. The isotropic elastic moduli are also predicted along with the polycrystalline aggregate properties including the bulk modulus, shear modulus, Young's modulus, and Poisson's ratio. The Pugh ratio indicates that Ni2 FeGa shows ductility, especially the austenite phase, which is consistent with the experimental results. The Debye temperatures of the Ni2 FeGa in the austenite and martensite phases are 344 K and 392 K, respectively. It is predicted that the magnetoelastic coefficient is -5.3×106 J/m3 and magnetostriction coefficient is between 135 and 55 ppm in the Ni2 FeGa austenite phase.

关键词: Ni2FeGa, elastic constants, first-principles calculations, magnetoelastic coefficients

Abstract:

The elastic, magnetoelastic, and phonon properties of Ni2 FeGa were investigated through first-principles calculations. The obtained elastic and phonon dispersion curves for the austenite and martensite phases agree well with available theoretical and experimental results. The isotropic elastic moduli are also predicted along with the polycrystalline aggregate properties including the bulk modulus, shear modulus, Young's modulus, and Poisson's ratio. The Pugh ratio indicates that Ni2 FeGa shows ductility, especially the austenite phase, which is consistent with the experimental results. The Debye temperatures of the Ni2 FeGa in the austenite and martensite phases are 344 K and 392 K, respectively. It is predicted that the magnetoelastic coefficient is -5.3×106 J/m3 and magnetostriction coefficient is between 135 and 55 ppm in the Ni2 FeGa austenite phase.

Key words: Ni2FeGa, elastic constants, first-principles calculations, magnetoelastic coefficients

中图分类号:  (Elastic moduli)

  • 62.20.de
62.20.dj (Poisson's ratio) 63.10.+a (General theory) 75.47.Np (Metals and alloys)