Ashcroft model potential study of lattice dynamics of α-Iron and barium

Made available in DSpace on 2022-04-28T20:00:44Z (GMT). No. of bitstreams: 0 Previous issue date: 1999-01-01 Ashcroft model potential has been used to compute phonon dispersion relations along the three principal symmetry directions, i.e. [k00], [kk0] and [kkk] for α-iron and barium. The computed phonons gave a reasonable agreement with the experimental ones in all the three principal summetry directions expect for the T2 branch in [KK0] direction where the present study failed to reproduce the experimental findings. Departamento de Física UNICAMP, 6165, Campinas, Sao Paulo Departamento de Física UNESP, 473, Bauru, Sao Paulo Departamento de Física UNESP, 473, Bauru, Sao Paulo