Pressure-induced transitions in ferroelectric single-crystal PbZr0.54Ti0.46O3

Ahart, Muhtar; Somayazulu, Maddury; Popov, Dmitry; Xie, Yujuan; Long, Xifa; Ye, Zuo-Guang; Cohen, R. E. and Hemley, Russell J. (2018): Pressure-induced transitions in ferroelectric single-crystal PbZr0.54Ti0.46O3. In: Ferroelectrics, Vol. 535, No. 1: pp. 106-113

Abstract

Pressure-induced phase transitions in single-crystal PbZr0.54Ti0.46O3 are investigated with high-pressure Raman scattering and x-ray single crystal and powder diffraction. The appearance of a Raman peak near 380cm(-1) indicates a structural transition at 3 GPa. A second transition, driven by an soft optical phonon, occurs at 9 GPa. A third transition occurs above 27 GPa, accompanied by a large changes in the Raman spectrum and splitting of the (pseudo-cubic) (111) and (220) diffraction lines. We identify the transitions as a monoclinic (Cm) to rhombohedral (R3m) transition at 3 GPa, followed by a rhombohedral (R3m) to rhombohedral (R-3c) transition at 9 GPa, and a further symmetry-lowering transition at 27 GPa.

• Item Type: Journal article
• Faculties: Geosciences > Department of Earth and Environmental Sciences
• Subjects: 500 Science > 550 Earth sciences and geology
• ISSN: 0015-0193
• Language: English