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

Phonon band structure and vibrational density of states (VDOS) along high-symmetry lines in the first Brillouin zone for (a) cubic (b) non-modulated martensite Ni₂FeGa alloys. The circles indicate the neutron-scattering measurement data from Ref. [38]. The imaginary values of the phonon frequencies are plotted along the negative frequency axis.