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首页> 外文期刊>IUCrJ >Determination of chemical ordering in the complex perovskite Pb(Cd1/3Nb2/3)O3
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Determination of chemical ordering in the complex perovskite Pb(Cd1/3Nb2/3)O3

机译：钙钛矿Pb（Cd1 / 3Nb2 / 3）O3络合物中化学有序性的测定

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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.
机译：首次合成纯相Pb（Cd1 / 3Nb2 / 3）O3（PCN）单晶和具有复杂钙钛矿结构的陶瓷。已通过X射线衍射（包括扩散散射）和Cs校正的透射电子显微镜实验研究了PCN中的局部化学有序性。结论是，PCN样品具有较大的连贯化学有序区域，甚至延伸到很长的距离，并且该排序模型与β型化学有序区域一致。还观察到反相畴边界。在这两种类型的样本中发现了两个介电异常峰，其中之一表明可能存在弛豫行为。完全有序区域的新颖结构及其与电性能的关系，使PCN成为了解化学取代钙钛矿的基础材料。

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