High pressure phases in highly piezoelectric Pb(Zr0.52Ti0.48)O3

Abstract

Two novel room-temperature phase transitions are observed, via synchrotron x-ray diffraction and Raman spectroscopy, in the Pb(Zr0.52Ti0.48)O3 alloy under hydrostatic pressures up to 16 GPa. A monoclinic (M)-to-rhombohedral (R1) phase transition takes place around 2-3 GPa, while this R1 phase transforms into another rhombohedral phase, R2, at about 6-7 GPa. First-principles calculations assign the R3m and R3c symmetry to R1 and R2, respectively, and reveal that R2 acts as a pressure-induced structural bridge between the polar R3m and a predicted antiferrodistortive R-3c phase.

arXiv commentREVTeX, 4 pages with 3 figures embedded. Figs 1 and 3 in color

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• Pressure dependence of the monoclinic phase in (1-x)Pb(Mg1/3Nb2/3)O3-xPbTiO3 solid solutions
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• Partial decoupling between strain and polarization in mono-oriented Pb(Zr0.2Ti0.8)O3 thin film
• High-pressure neutron study of the morphotropic PZT: phase transitions in a two-phase system
• First principle study of structural, elastic, electronic and optical properties of Pb0.5Sn0.5TiO3 and Pb0.5Sn0.5Ti0.5(Zr0.5)O3