Morphotropic Phase Boundaries Of (1-X)Pb(Zn1/3nb2/3)O-3-Xpbtio(3) Probed By Raman Spectroscopy At High Temperature

Morphotropic phase boundaries (MPBs) in relaxor Pb(Zn1/3Nb2/3)O-3-ferroelectric PbTiO3 systems were investigated by means of angle-resolved polarized Raman spectroscopy at 800 K in the paraelectric phase. The features of the spectra represented by contour maps were extracted through the multivariate curve resolution (MCR) method, rendering the comparison among the data with six compositions more accurate and convenient. The result indicates that the structure becomes unstable at x = 0.07, which is slightly smaller than the MPB occurring at x = 0.09. The additional analysis using the MCR method to investigate the x dependence of the extracted Raman spectra shows anomalies at the MPB. The information related to the MPB near room temperature could be extracted through Raman spectroscopy even in a simple high-temperature paraelectric phase.