Determination of chemical ordering in the complex perovskite Pb(Cd(1/3)Nb(2/3))O(3).
Determination of chemical ordering in the complex perovskite Pb(Cd(1/3)Nb(2/3))O(3).
复制标题
复合钙钛矿 Pb(Cd1/3Nb2/3)O-3 化学排序的测定
DOI：
10.1107/s2052252518013805
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发表时间：
2018-11-01
期刊：
影响因子：
3.9
通讯作者：
Ye ZG
中科院分区：
文献类型：
--
作者：
Wang C;Fu Z;Zhang N;Paściak M;Zhuang J;Liu Z;Ren W;Ye ZG
Using various experimental methods including X-ray diffraction and electron microscopy, this work determines the range and nature of the chemical ordering in Pb(Cd1/3Nb2/3)O3 (PCN). The influence of the chemical ordering on the dielectric property is also discussed, based on the similarities and differences between PCN and other classical relaxors. Pure-phase Pb(Cd1/3Nb2/3)O3 (PCN) single crystals and ceramics with a complex perovskite structure are synthesized for the first time. The local chemical ordering in PCN has been investigated by X-ray diffraction (including diffuse scattering) and Cs-corrected transmission electron microscopy experiments. It is concluded that the PCN samples have large coherent chemical ordering regions that even extend to the long range, and the ordering model is consistent with β-type chemical ordered regions. The antiphase domain boundaries were also observed. Two dielectric anomaly peaks were found in these two types of samples, one of which indicates possible relaxor behaviour. The novel structure of the completely ordered regions and its relationship with the electrical properties make PCN a unique material for the fundamental understanding of chemically substituted perovskites.
