Temperature-dependent phase transition in [001] C -oriented 0.72Pb(Mg 1/3 Nb 2/3 )O 3 -0.28PbTiO 3 single crystals

Xiaoyan Lu, Huaping Wu, Hangbo Zhang, Limei Zheng, Jinhui Fan, Wenwu Cao, Hui Li

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2 Scopus citations

Abstract

Temperature-dependent dielectricity and polarization of [001] C -oriented 0.72Pb(Mg 1/3 Nb 2/3 )O 3 -0.28PbTiO 3 relaxor-based ferroelectric single crystals were studied by using a combined method of the X-ray diffraction, dielectric spectrum, polarization-electric (P-E) field hysteresis loops, and the Landau-phenomenological theory. Results show that the room-temperature rhombohedral phase experiences a rhombohedral-monoclinic-tetragonal coexisting state, then transforms to tetragonal phase, and finally to cubic phase during the zero-field-heating process. The six-order Landau-type thermal expansion parameters for the tetragonal phase were determined by using the typical characteristics at the cubic-tetragonal phase transition in the temperature range from 91 °C to 113 °C. The calculated dielectric curve, polarizations, and P-E loops fit well with the experimental results. The phase stability and piezoelectricity are further studied and compared with those of the PMN-0.36PT single crystal. The provided methods and obtained Landau parameters can be used for further studies on the relaxor-based ferroelectric single crystals.

Original languageEnglish (US)
Pages (from-to)13999-14005
Number of pages7
JournalCeramics International
Volume45
Issue number11
DOIs
StatePublished - Aug 1 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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