Vibrational modes in (Pb,La)(Zr,Ti)O₃ ceramics

Results are presented for the Raman spectra, the far-infrared reflectivity spectra, and the radio-frequency dielectric constant of several selected PLZT ceramics. Vibrational modes are assigned by comparing these results with previous Raman and infrared measurements on single-crystal PbTiO3, and the PZT and PLT mixed ceramic systems. The mode responsible for the temperature variation of the low-frequency dielectric constant was not observed but is shown to be below 65 cm-1. © 1974 American Institute of Physics.