The complexity of structural phase transitions in Pb(Hf0.92Sn0.08)O3 single crystals
Pb(Hf1−xSnx)O3 single crystals with x = 0.08 were characterized using single‐crystal X‐ray diffraction and Raman scattering, in a wide temperature range. The information concerning the structure of two intermediate phases (IMs), situated between low‐temperature antiferroelectric A1 and high‐temperat...
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Published in | Journal of the American Ceramic Society Vol. 104; no. 11; pp. 5990 - 6001 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Columbus
Wiley Subscription Services, Inc
01.11.2021
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Subjects | |
Online Access | Get full text |
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Summary: | Pb(Hf1−xSnx)O3 single crystals with x = 0.08 were characterized using single‐crystal X‐ray diffraction and Raman scattering, in a wide temperature range. The information concerning the structure of two intermediate phases (IMs), situated between low‐temperature antiferroelectric A1 and high‐temperature paraelectric PE phases, was obtained. The lower temperature IM, A2, is characterized by incommensurate displacive modulations in the Pb sublattice. The higher temperature IM, is characterized by tilting of oxygen octahedra, and serious disorder coming from lead ions represented by X‐ray diffuse scattering. Optical phonons and phase transitions in Pb(Hf1−xSnx)O3 single crystals were investigated by temperature‐dependent Raman spectra. It was found that several soft modes control the phase transition between two antiferroelectric phases indicating its displacive character, whereas, in the paraelectric phase, both soft modes and Rayleigh scattering were observed. |
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ISSN: | 0002-7820 1551-2916 |
DOI: | 10.1111/jace.17967 |