Structural, electronic and dynamical stability of heavy metal iron pernitride: a spin polarized first-principles studySanjay D. Gupta, Sanjeev K. Gupta and Prafulla K. JhaEur. Phys. J. B, 86 1 (2013) 8DOI: https://doi.org/10.1140/epjb/e2012-30114-3