Local Structural Investigation of (Ba,Ca)(Zr,Ti)O<sub>3</sub> and Ca(Zr,Ti)O<sub>3</sub> by X‐Ray Fluorescence Holography
Local Structural Investigation of (Ba,Ca)(Zr,Ti)O<sub>3</sub> and Ca(Zr,Ti)O<sub>3</sub> by X‐Ray Fluorescence Holography
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X射线荧光全息术研究(Ba,Ca)(Zr,Ti)O<sub>3</sub>和Ca(Zr,Ti)O<sub>3</sub>的局部结构
DOI：
10.1002/pssb.202100609
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Hayashi Kouichi
中科院分区：
文献类型：
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作者：
Yamamoto Yuta;Kimura Koji;Gadelmawla Ahmed;Kawamura Keisuke;Sugimoto Hina;Liu Donglin;Li Qiang;Yan Qingfeng;Khansur Neamul H.;Happo Naohisa;Kakimoto Ken‐ichi;Webber Kyle G.;Hayashi Kouichi
用X射线荧光全息术分析了铁电体（Ba，Ca）（Zr，Ti）O3（BCZT）和顺电体Ca（Zr，Ti）O3（CZT）中Zr掺杂的局域结构。从测量的全息图中清晰地重建了这些ABO3钙钛矿的A和B位阳离子的图像。在真实的空间像中，在BCZT和CZT的原子像中观察到最近的Ba和Ca向外位移0.2 μ m，这归因于Zr 4+和Ti 4+之间的离子半径的差异。此外，BCZT中的第一相邻钛向内位移0.5 μ m，而CZT中未观察到此类位移。这种位移是由于BCZT中的局部晶格产生了较大的应变而引起的，并对BCZT的压电响应产生影响。
Analyses of the local structures around Zr doped in ferroelectric (Ba,Ca)(Zr,Ti)O3(BCZT) and paraelectric Ca(Zr,Ti)O3(CZT) are carried out by X‐ray fluorescence holography. The images of the cations at the A and B sites of these ABO3perovskites are clearly reconstructed from the measured holograms. In the real space images, a 0.2 Å outward displacement of the nearest Ba and Ca is observed in the atomic images of both BCZT and CZT, attributable to the difference in the ionic radius between Zr4+and Ti4+. In addition, the first‐neighboring Ti in BCZT is displaced inward by 0.5 Å, whereas no such displacement is observed in CZT. This shift of Ti in BCZT appears due to the large strain of the local lattice, and it can affect to the piezoelectric response of BCZT.