High-resolution synchrotron XRD study of Zr-rich compositions of Pb(ZrxTi1-x)O3 (0.525≤ x ≤ 0.60): evidence for the absence of the rhombohedral phase
Abstract
Results of Rietveld analysis of the synchrotron XRD data on Pb(ZrxTi1-x)O3 (PZT) for 0.525≤x≤0.60 are presented to show the absence of rhombohedral phase on the Zr-rich side of the morphotropic phase boundary (MPB). Our results reveal that the structure of PZT is monoclinic in the Cm space group for 0.525≤ x≤ 0.60. The nature of the monoclinic distortion changes from pseudo-tetragonal for 0.525≤x≤0.54 to pseudo-rhombohedral for x>0.54.
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