Polarized Micro-Raman Study of the Temperature-Induced Phase Transition In0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3
SUN Jing-Ya1,2, YANG Yang2, ZHU Ke2, LIU Yu-Long2, SIU G. G.3, XU Z. K.3
1College of Science, Beijing University of Chemical Technology, Beijing 1000292Institute of Physics, Chinese Academy of Sciences, Beijing 1000803Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
Polarized Micro-Raman Study of the Temperature-Induced Phase Transition In0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3
SUN Jing-Ya1,2;YANG Yang2;ZHU Ke2;LIU Yu-Long2;SIU G. G.3;XU Z. K.3
1College of Science, Beijing University of Chemical Technology, Beijing 1000292Institute of Physics, Chinese Academy of Sciences, Beijing 1000803Department of Physics and Materials Science, City University of Hong Kong, Hong Kong
摘要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°C by micro-Raman scattering technique. The results clearly 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°C, corresponding to the vanishing of the soft A1 mode at 106cm-1 recorded in the parallel polarization. The latter appears at about TT-C=144°C, which can be verified with the vanishing of mode at 780cm-1 measured in the crossed polarization.
Abstract：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°C by micro-Raman scattering technique. The results clearly 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°C, corresponding to the vanishing of the soft A1 mode at 106cm-1 recorded in the parallel polarization. The latter appears at about TT-C=144°C, which can be verified with the vanishing of mode at 780cm-1 measured in the crossed polarization.
SUN Jing-Ya;YANG Yang;ZHU Ke;LIU Yu-Long;SIU G. G.;XU Z. K.. Polarized Micro-Raman Study of the Temperature-Induced Phase Transition In0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3[J]. 中国物理快报, 2008, 25(1): 290-293.
SUN Jing-Ya, YANG Yang, ZHU Ke, LIU Yu-Long, SIU G. G., XU Z. K.. Polarized Micro-Raman Study of the Temperature-Induced Phase Transition In0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3. Chin. Phys. Lett., 2008, 25(1): 290-293.
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