First-principles calculations on elastic, magnetoelastic, and phonon properties of Ni<sub>2</sub>FeGa magnetic shape memory alloys

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

He Wangqiang^†, Huang Houbing^‡, Liu Zhuhong, Ma Xingqiao

(a) The L2₁ Heusler structure of Ni₂FeGa fabricated with the conventional unit cell, and (b) the conventional tetragonal cell used in the phonon calculations. The black, gray, and white circles in the pictures represent the Ni, Fe, and Ga atoms, respectively.