TY - JOUR
T1 - Temperature-dependent phase transition in [001] C -oriented 0.72Pb(Mg 1/3 Nb 2/3 )O 3 -0.28PbTiO 3 single crystals
AU - Lu, Xiaoyan
AU - Wu, Huaping
AU - Zhang, Hangbo
AU - Zheng, Limei
AU - Fan, Jinhui
AU - Cao, Wenwu
AU - Li, Hui
N1 - Funding Information:
This research was supported by the National Science Foundation of China (No. 11872019 ) and the National Key Research and Development Program of China ( 2018YFC0705601 ).
Publisher Copyright:
© 2019 Elsevier Ltd and Techna Group S.r.l.
PY - 2019/8/1
Y1 - 2019/8/1
N2 - 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.
AB - 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.
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U2 - 10.1016/j.ceramint.2019.04.099
DO - 10.1016/j.ceramint.2019.04.099
M3 - Article
AN - SCOPUS:85064214239
SN - 0272-8842
VL - 45
SP - 13999
EP - 14005
JO - Ceramics International
JF - Ceramics International
IS - 11
ER -