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This article is cited in 13 scientific papers (total in 13 papers)
Ferroelectricity
Phase transitions in lead hafnate PbHfO$_{3}$ under high pressure
M. A. Kniazevaa, D. A. Andronikovaab, G. A. Lityagina, Yu. A. Bronvaldab, P. Parisiadesc, A. Majchrowskid, K. Roledere, A. V. Filimonova, R. G. Burkovskya a Peter the Great St. Petersburg Polytechnic University
b Ioffe Institute, St. Petersburg
c European Synchrotron Radiation Facility (ESRF),
Grenoble, France
d Institute of Applied Physics, Military University of Technology,
Warszawa, Poland
e Institute of Physics, University of Silesia, Chorzów, Poland
Abstract:
he effect of hydrostatic pressure on phase transitions in lead hafnate (PbHfO$_{3}$) has been studied by the methods of X-ray diffraction and X-ray diffuse scattering. The measurements were performed in the temperature range of 182 $<T<$ 316$^\circ$C and the pressure range of 1.6 $<P<$ 2.6 GPa. Four regions characterized by different X-ray diffraction patterns and corresponding to an antiferroelectric phase, phases with a long-wavelength modulation of the lead sublattice, and phases with different distortions of the oxygen sublattice are identified. In the temperature region immediately above the region of phases with a long-wavelength modulation, a temperature-dependent maximum in the distribution of diffuse scattering was detected, which means that such a modulation is formed due to condensation of an incommensurate soft mode.
Keywords:
antiferroelectricity, lead hafnate, high pressure, order parameters, diffuse scattering.
Received: 14.03.2019 Revised: 24.04.2019 Accepted: 14.05.2019
Citation:
M. A. Kniazeva, D. A. Andronikova, G. A. Lityagin, Yu. A. Bronvald, P. Parisiades, A. Majchrowski, K. Roleder, A. V. Filimonov, R. G. Burkovsky, “Phase transitions in lead hafnate PbHfO$_{3}$ under high pressure”, Fizika Tverdogo Tela, 61:10 (2019), 1806–1812; Phys. Solid State, 61:10 (2019), 1759–1765
Linking options:
https://www.mathnet.ru/eng/ftt8658 https://www.mathnet.ru/eng/ftt/v61/i10/p1806
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