A critical discussion of calculated modulated structures, Fermi surface nesting and phonon softening in magnetic shape memory alloys Ni$_2$Mn(Ga, Ge, Al) and Co$_2$Mn(Ga, Ge)

A. T. Zayak; P. Entel

doi:10.1016/j.jmmm.2004.11.401

paper

A critical discussion of calculated modulated structures, Fermi surface nesting and phonon softening in magnetic shape memory alloys Ni $_{2}$ Mn(Ga, Ge, Al) and Co $_{2}$ Mn(Ga, Ge)

arXiv:cond-mat/0407157 · doi:10.1016/j.jmmm.2004.11.401

Abstract

A series of first principles calculations have been carried out in order to discuss electronic structure, phonon dynamics, structural instabilities and the nature of martensitic transformations of the Heusler alloys Ni $_{2}$ Mn(Ga, Ge, Al) and Co $_{2}$ Mn(Ga, Ge). The calculations show that besides electronic pecularities like Fermi--surface nesting, hybridizing optical and acoustic phonon modes are important for the stabilization of the modulated martensitic structures.

3 pages, 4 figures, JEMS-2004

A critical discussion of calculated modulated structures, Fermi surface nesting and phonon softening in magnetic shape memory alloys Ni2​Mn(Ga, Ge, Al) and Co2​Mn(Ga, Ge)

Abstract

A critical discussion of calculated modulated structures, Fermi surface nesting and phonon softening in magnetic shape memory alloys Ni $_{2}$ Mn(Ga, Ge, Al) and Co $_{2}$ Mn(Ga, Ge)