Lattice dynamics of strontium tungstate

Pramana

S L Chaplot¹  A K Tyagi²  Prabhatasree Goel1¹  R Mittal1¹ 

[1] Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$;Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$

关键词: Inelastic neutron scattering;    lattice dynamics;    phonons.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

We report here measurements of the phonon density of states and the lattice dynamics calculations of strontium tungstate (SrWO4). At ambient conditions this compound crystallizes to a body-centred tetragonal unit cell (space group I41/a) called scheelite structure. We have developed transferable interatomic potentials to study the lattice dynamics of this class of compounds. The model parameters have been fitted with respect to the experimentally available Raman and infra-red frequencies and the equilibrium unit cell parameters. Inelastic neutron scattering measurements have been carried out in the triple-axis spectrometer at Dhruva reactor. The measured phonon density of states is in good agreement with the theoretical calculations, thus validating the inter-atomic potential developed.

【 授权许可】

Unknown