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. und Hemley, Russell J. (2018): Pressure-induced transitions in ferroelectric single-crystal PbZr0.54Ti0.46O3. In: Ferroelectrics, Bd. 535, Nr. 1: S. 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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• ISSN: 0015-0193
• Sprache: Englisch