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

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

arxiv: cond-mat/0312448 · v1 · submitted 2003-12-17 · ❄️ cond-mat.mtrl-sci

Raman studies of polycrystalline CaCu₃Ti₄O₁₂ 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 This is my paper

classification ❄️ cond-mat.mtrl-sci

keywords pressureramancacucctomodesobservedpolycrystallineunder

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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$\bar 3$) 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.

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Raman studies of polycrystalline CaCu₃Ti₄O₁₂ under high-pressure

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