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首页> 外文期刊>Applied Physics >Temperature-dependent Raman spectra and electrical properties of 0.69Pb(Mg_(1/3)Nb_(2/3))O_3-0.31PbTiO_3 single crystals
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Temperature-dependent Raman spectra and electrical properties of 0.69Pb(Mg_(1/3)Nb_(2/3))O_3-0.31PbTiO_3 single crystals

机译：0.69Pb（Mg_（1/3）Nb_（2/3））O_3-0.31PbTiO_3单晶的随温度变化的拉曼光谱和电性能

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摘要

The temperature-dependent Raman spectra and electrical properties of the 0.69Pb(Mg_(1/3)Nb_(2/3))O_3-0.31PbTiO_3 (0.69PMN-0.31PT) single crystals were investigated. Based on the group theory, the poled 0.69PMN-0.31PT single crystals belong to the monoclinic crystal system, which was confirmed by the room-temperature Raman spectra. The 0.69PMN-0.31PT single crystals experience successive structural phase transitions, i.e., a monoclinic-tetragonal (FE_M-FE_T) phase transition at T_(M-T) and a tetragonal-cubic (FE_T-P_C) phase transition at T_m determined by the dielectric measurement. Due to the enhancement of long-range order, their FE_M-FE_T phase transition becomes more obvious after the poling process. The wavenumbers and line widths of the 271, 502, 575, 795 cm~(-1) Raman modes, and the intensity ratios of I_(271cm~(-1))/I_(795cm~(-1)) and I_(502cm~(-1))/I_(575cm~(-1)) exhibit obvious anomalies around T_(M-T) and T_m, which are closely related to the FE_M-FE_T and FE_T-P_C phase transitions. The temperature and electric field (E)-induced phase transitions are observed in the unipolar strain-E (S-E) curves. The converse piezoelectric constant (d_(33)), maximum strain value (S_(max)%) and longitudinal electrostrictive coefficient (Q) increase considerably around the ferroelectric phase transition temperature T_(M-T).
机译：研究了0.69Pb（Mg_（1/3）Nb_（2/3））O_3-0.31PbTiO_3（0.69PMN-0.31PT）单晶的随温度变化的拉曼光谱和电性能。根据群论，极化的0.69PMN-0.31PT单晶属于单斜晶系，这是通过室温拉曼光谱证实的。 0.69PMN-0.31PT单晶经历了连续的结构相变，即在T_（MT）处的单斜四方（FE_M-FE_T）相变和在T_m处的四方立方（FE_T-P_C）相变由电介质确定测量。由于远程顺序的增强，在极化过程之后，它们的FE_M-FE_T相变变得更加明显。 271、502、575、795 cm〜（-1）拉曼模的波数和线宽以及I_（271cm〜（-1））/ I_（795cm​​〜（-1））和I_（ 502cm〜（-1））/ I_（575cm〜（-1））在T_（MT）和T_m附近表现出明显的异常，与FE_M-FE_T和FE_T-P_C的相变密切相关。在单极应变-E（S-E）曲线中观察到温度和电场（E）引起的相变。在铁电相变温度T_（M-T）附近，逆压电常数（d_（33）），最大应变值（S_（max）％）和纵向电致伸缩系数（Q）显着增加。

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  • 来源
    《Applied Physics》 |2016年第9期|811.1-811.9|共9页
  • 作者

    Bijun Fang; Xing Liu; Xiaobing Li; Jianning Ding; Xiangyong Zhao; Haosu Luo;

  • 作者单位

    School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, People's Republic of China;

    School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, People's Republic of China,Key Laboratory of Inorganic Function Material and Device, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China;

    Key Laboratory of Inorganic Function Material and Device, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China;

    School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, People's Republic of China,School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, People's Republic of China;

    Key Laboratory of Inorganic Function Material and Device, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China;

    Key Laboratory of Inorganic Function Material and Device, Chinese Academy of Sciences, Shanghai 201800, People's Republic of China;

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