The First-Order Raman Spectra and Lattice Dynamics for Sintered body-centered tetragonal BaWO_4 Crystalline

摘要

The first-order Raman spectra of sintered body-centered BaWO_4 crystalline are measured at room temperature. The phonon dispersion curves of BaWO_4 are calculated on the basis of a rigid-ion model using the measured frequency values. The temperature dependence of the phonon specific heat capacity, and the elastic constants of BaWO_4 are calculated using one-phonon density of states and three acoustic phonon frequencies obtained from phonon dispersion curves, respectively.