Souza Filho, A. G.Faria, J. L BFreire, P. T CAyala, A. P.Sasaki, J. M.Melo, F. E AMendes Filho, J.Araújo, E. B. [UNESP]Eiras, J. A.2014-05-272014-05-272001-08-20Journal of Physics Condensed Matter, v. 13, n. 33, p. 7305-7314, 2001.0953-8984http://hdl.handle.net/11449/66563A Raman study of structural changes in the Zr-rich PbZr1-x TixO3 (PZT) system under hydrostatic pressures up to 5.0 GPa is presented. We observe that externally applied pressure induces several phase transitions in PZT ceramics among phases with orthorhombic (Ao), rhombohedral low-temperature (RLT), and rhombohedral high-temperature (RHT) symmetries (all found in PZT at ambient pressure and room temperature). Each of the compositions investigated (0.02 ≤ x ≤ 0.14) exhibits a high-pressure phase with orthorhombic (OI′) symmetry. We further report a detailed study of the pressure dependence of Raman frequencies to elucidate the phase transitions and to provide a set of pressure coefficients for the high-pressure phases.7305-7314engHydrostatic pressureLead compoundsPhase diagramsPhase transitionsRaman spectroscopyThermal effectsZirconiumLead titanate zirconate (PZT)Ceramic materialsArtigo10.1088/0953-8984/13/33/311Acesso restrito2-s2.0-00359205816725982228402054