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

被引：8

作者：

He, Wangqiang ^{[1
]}

Huang, Houbing ^{[1
]}

Liu, Zhuhong ^{[1
]}

Ma, Xingqiao ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Dept Phys, Beijing 100083, Peoples R China

来源：

CHINESE PHYSICS B | 2018年 / 27卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Ni2FeGa; elastic constants; first-principles calculations; magnetoelastic coefficients; FIELD-INDUCED STRAIN; NI-GA; MARTENSITIC-TRANSFORMATION; NI2MNGA; MICROSTRUCTURE;

D O I：

10.1088/1674-1056/27/1/016201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The elastic, magnetoelastic, and phonon properties of Ni2FeGa 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 Ni2FeGa shows ductility, especially the austenite phase, which is consistent with the experimental results. The Debye temperatures of the Ni2FeGa in the austenite and martensite phases are 344 K and 392 K, respectively. It is predicted that the magnetoelastic coefficient is -5.3 x 10(6) J/m(3) and magnetostriction coefficient is between 135 and 55 ppm in the Ni2FeGa austenite phase.

引用

页数：6