%0 Journal Article
%T Ordering and phonons in Ba$_3$CaNb$_{2}$O$_9$ complex perovskite
%A JoŁżo Elias Figueiredo Soares Rodrigues
%A Edvan Moreira
%A D¨¦bora Morais Bezerra
%A Adeilton Pereira Maciel
%A Carlos William de Araujo Paschoal
%J Physics
%D 2013
%I arXiv
%R 10.1016/j.materresbull.2013.05.005
%X In this work we performed a detailed investigation about ordering in \bcn perovskite. The sintering temperature and time were changed to obtain samples with different ordering. The order parameters were probed by Raman spectroscopy based on a partial disordered model. To use the partial disordered model correctly we performed {\it ab initio} calculations in \bcn to assign the optical phonons. The results showed that sintering temperature improves order while sintering time is not so efficient to promote order.
%U http://arxiv.org/abs/1304.0535v1