Raman studies of polycrystalline CaCu$_3$Ti$_4$O$_{12}$ under high-pressure

D. Valim; A. G. Souza Filho; P. T. C. Freire; A. P. Ayala; J. Mendes Filho; A. F. L. Almeida; P. B. A. Fechine; A. S. B. Sombra

paper

Raman studies of polycrystalline CaCu $_{3}$ Ti $_{4}$ O $_{12}$ under high-pressure

arXiv:cond-mat/0312448

Abstract

We report a Raman scattering study of polycrystalline CaCu $_{3}$ Ti $_{4}$ O $_{12}$ (CCTO) under pressure up to 5.32 GPa. The pressure dependence of several Raman modes was investigated. No anomalies have been observed on the phonon spectra thereby indicating that the T $_{h}$ (Im $3 ˉ$ ) structure remains stable for pressures up to 5.32 GPa. The pressure coefficients for the observed modes were determined. This set of parameters was used for evaluating the stress developed in CCTO thin films.

3 pages, 2 figures

Raman studies of polycrystalline CaCu3​Ti4​O12​ under high-pressure

Abstract

Raman studies of polycrystalline CaCu $_{3}$ Ti $_{4}$ O $_{12}$ under high-pressure