＜113＞c晶带轴下Ba(B'1/3B″2/3)O3钙钛矿B位1∶2有序结构的透射电镜表征

马翩翩; 刘观福; 乔茵; 徐人豪

doi:10.16495/j.1006-3757.2022.02.001

＜113＞_c晶带轴下Ba(B'_1/3B″_2/3)O₃钙钛矿B位1∶2有序结构的透射电镜表征

doi: 10.16495/j.1006-3757.2022.02.001

浙江理工大学材料科学与工程学院, 浙江杭州 310018

基金项目:

国家自然科学基金 51702290

详细信息

作者简介:
马翩翩(1989-)，女，副教授，从事材料科学的研究，E-mail: pianpianma@zstu.edu.cn

中图分类号: TN16;TB321
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- 被引次数: 0
出版历程
- 收稿日期: 2022-05-20
- 修回日期: 2022-05-26
- 网络出版日期: 2022-07-07
- 刊出日期: 2022-06-30

Characterization of B-Site 1∶2 Ordering Structure for Ba(B′_1/3B″_2/3)O₃ Perovskites Along ＜113＞_c Zone Axis by Transmission Electron Microscopy

School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China

Funds:

National Science Foundation of China 51702290

摘要

摘要: 提出了通过透射电子显微镜表征Ba(B′_1/3B″_2/3)O₃钙钛矿(B′ = Zn²⁺、Mg²⁺、Co²⁺或Ni²⁺，B″ = Ta⁵⁺或Nb⁵⁺)B位1∶2有序结构时可采用的一个新的晶带轴(< 113>_c)，并首次研究了 < 113>_c带轴下有序钙钛矿的原子架构. 在 < 113>_c晶带轴下，选区电子衍射(SAED)中的±1/3{112}型超晶格斑点揭示了钙钛矿的1∶2有序结构. 对应的高分辨电子衍射(HRTEM)图像清楚地显示了有序畴的大小和原子结构. 高分辨图像中的成分衬度与原子结构非常匹配，进一步证实了沿 < 113>_c带轴下的1∶2有序结构.
- 透射电子显微镜 /
- 钙钛矿 /
- 晶体结构 /
- 有序
Abstract: A new zone axis (< 113>_c) has been provided to characterize the 1∶2 ordering structure of Ba(B′_1/3B″_2/3)O₃ (B′ = Zn²⁺, Mg²⁺, Co²⁺ or Ni²⁺, B″ = Ta⁵⁺ or Nb⁵⁺) perovskite by transmission electron microscopic (TEM) observation, and the corresponding atomic architecture of ordered perovskites has also been studied firstly. The 1∶2 ordering structure was revealed by the ±1/3{112}-type superlattice spots in the selected area electron diffraction (SAED) pattern. The corresponding high resolution transmission electron microscopic (HRTEM) image clearly displayed the ordering domain size and atomic structure. The composition contrast in HRTEM image matched well with the atomic architecture, further confirmed the 1∶2 ordering structure along < 113>_c zone axis.
- transmission electron microscopy /
- perovskite /
- crystal structure /
- ordering

HTML全文

图 1 Ba(B′_1/3B″_2/3)O₃钙钛矿的晶体结构(a) 无序排列，(b) 1∶2有序排列，示意图显示了沿不同投影的原子有序排列结构：＜111＞_c、＜110＞_c和＜113＞_c

Figure 1. Crystal structure of (a) disordered and (b) 1∶2 ordered of Ba(B′_1/3B″_2/3)O₃ perovskites Schematic diagrams showing the atomic architectures of ordered structure along different projections: ＜111＞_c, ＜110＞_c and ＜113＞_c

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图 2 沿[113]_c带轴下BCZN样品的SAED(a)和HRTEM(b) 图像

Figure 2. (a) SAED pattern and (b) HRTEM image viewed along [113]_c zone axis for BCZN sample

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图 3 (a) 沿[113]_c带轴的详细有序结构分析, (b) 标记区域的更高放大晶格图像，插图显示了相应的原子结构

Figure 3. (a) Detailed ordering structure analysis along [113]_c zone axis and (b) higher amplification lattice image of marked area, inset shows corresponding atomic architecture

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表 1 Ba(B′_1/3B″_2/3)O₃钙钛矿沿不同区域轴的排序特征总结

Table 1. Summary of ordering features for Ba(B′_1/3B″_2/3)O₃ perovskites along various zone axises

带轴	超晶格点	超晶格间距/nm	可见畴比例	参考文献
＜110＞_c	±1/3{111}	0.71	1/2	[19]
＜111＞_c	±1/3{112}	0.50	1/4	[19]
＜110＞_c	±1/3{111}	0.71	1/4	[19]
＜113＞_c	±1/3{112}	0.50	1/6	本工作

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