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Raman scattering and x-ray diffraction studies of polycrystalline CaCu3Ti4O12 u...

Reis Júnior, Daniel Valim dos; Souza Filho, Antônio Gomes de; Freire, Paulo de Tarso Cavalcante; Fagan, Solange Binotto; Ayala, Alejandro Pedro

We report Raman scattering and x-ray diffraction studies of polycrystalline CaCu3Ti4O12 (CCTO) under high pressures. The pressure dependence of several Raman modes was investigated. No anomalies have been observed on the phonon spectra thereby indicating that the Th sIm 3¯d structure remains stable up to the maximum pressure s5.3 GPad we reached in this experiment. The pressure coefficients for the observed Ram...

Date: 2012   |   Origin: Oasisbr
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