First-principles study of lattice instabilities in ferromagnetic Ni2MnGa -: art. no. 134104

The phonon-dispersion relations and elastic constants for ferromagnetic Ni2MnGa in the cubic and tetragonally distorted Heusler structures are computed using density-functional and density-functional-perturbation theory within the spin-polarized generalized-gradient approximation. For 0.9