Local structures and temperature-driven polarization rotation in Zr-rich PbZr1-xTixO3

Local structures and temperature-driven polarization rotation in Zr-rich PbZr1-xTixO3
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富锆 PbZr1-xTixO3 中的局部结构和温度驱动的极化旋转

DOI:
10.1063/1.5024422
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发表时间:
2018-07
影响因子:
4
通讯作者:
Ye Zuo-Guang
Ye Zuo-Guang
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wang Zhen;Zhang Nan;Yokota Hiroko;Glazer A. M.;Yoneda Yasuhiro;Ren Wei;Ye Zuo-Guang

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PbZr 1-xTixO 3在相应的物理性质中具有丰富的结构变化,已被用于各种各样的应用中。为了了解结构对其高性能压电性能的影响,对其局部和平均结构进行了研究。在20 K和300 K的高能同步辐射粉末衍射实验中获得了总散射数据。利用逆蒙特卡罗方法,从X射线对分布函数数据中提取了有关阳离子位移的信息。这表明B阳离子的局域无序主要是由热运动驱动的,而Pb的局域无序很可能是由更复杂的因素如位移无序引起的。在富锆PZT中观察到菱面体和单斜的局部极化,其方向依赖于温度。
PbZr1-xTixO3, which has abundant structural variations in the corresponding physical properties, has been used in a large variety of applications. To understand the effect of the structure on its high-performance piezoelectric properties, its local and average structures are studied. Total scattering data have been obtained from high-energy synchrotron powder diffraction experiments at 20 K and 300 K. Using the reverse Monte Carlo method, information on cation displacements has been extracted from X-ray Pair Distribution Function data. This suggests that the local disorder of the B cations is mainly driven by thermal motion, while the local disorder of Pb is most likely caused by more complex factors, such as displacive disorder. Both rhombohedral and monoclinic local polarizations are observed in Zr-rich PZT, whose directions depend on temperature.
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期刊: Physical Review B
影响因子: 3.7
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