Polarized Micro-Raman Study of the Temperature-Induced Phase Transition In 0.67 Pb(Mg1/3Nb2/3)O3-0.33PbTiO3

SUN Jing-Ya; YANG Yang; ZHU Ke; LIU Yu-Long; SIU G.G.; XU Z.K.

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Polarized Micro-Raman Study of the Temperature-Induced Phase Transition In 0.67 Pb(Mg1/3Nb2/3)O3-0.33PbTiO3

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Polarized Raman spectra of ferroelectric relaxor 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3(0.67PMN-0.33PT)single crystal are systematically investigated in a wide temperature range from-196 to 600℃ by micro-Raman scattering technique.The results dearly reveal that there are two structural phase transitions in such composite ferroelectric relaxor:the rhombohedral-tetragonal(R-T)phase transition and the tetragonal-cubic(T-C)phase transition.The former occurs at about TR-T=34℃,corresponding to the vanishing of the soft A1 mode at 106 cm-1 recorded in the parallel polarization.The latter appears at about TT-C=144℃, which can be verified with the vanishing of mode at 780 cm-1 measured in the crossed polarization.

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《中国物理快报：英文版》 |2008年第1期|290-293|共4页
作者
SUN Jing-Ya; YANG Yang; ZHU Ke; LIU Yu-Long; SIU G.G.; XU Z.K.;
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College of Science,Beijing University of Chemical Technology,Beijing 100029;

Institute of Physics,Chinese Academy of Sciences,Beijing 100080;

Institute of Physics,Chinese Academy of Sciences,Beijing 100080;

Institute of Physics,Chinese Academy of Sciences,Beijing 100080;

Institute of Physics,Chinese Academy of Sciences,Beijing 100080;

Department of Physics and Materials Science.City University of Hong Kong,Hong Kong;

Department of Physics and Materials Science.City University of Hong Kong,Hong Kong;

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中图分类物理学;
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Polarized Micro-Raman Study of the Temperature-Induced Phase Transition In 0.67 Pb(Mg1/3Nb2/3)O3-0.33PbTiO3

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