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A new insight into largely defocused HAADF-STEM imaging and visualization of strain field

文献类型：期刊论文

作者Hu, Wen-Tao1,2; Tian, Min3; Wang, Yu-Jia1,2; Zhu, Yin-Lian4,5
刊名MATERIALS CHARACTERIZATION
出版日期2024-09-01
卷号215页码:9
关键词HAADF-STEM imaging Imaging heterostructure Largely defocused imaging Misfit dislocation network Visualizing strain field
ISSN号1044-5803
DOI10.1016/j.matchar.2024.114209
通讯作者Wang, Yu-Jia(yjwang@imr.ac.cn) ; Zhu, Yin-Lian(zhuyinlian@sslab.org.cn)
英文摘要A crystalline bilayer specimen with a semi-coherent interface can generate moire fringes in the high-angle annular-dark field scanning transmission electron microscopy (HAADF-STEM) imaging. Moreover, when the probe is significantly defocused, this specimen can produce largely defocused probe (LDP)-STEM patterns. Although the electron channeling effect serves as the fundamental principles for HAADF-STEM imaging, its connection to the emergence of LDP-STEM patterns remains unclear. The missing link lies in identifying the location of the imaged region. To address this issue, we examined the strain field in three-dimensional space and its interaction with the convergent electron beam, taking the PbZrO3/SrTiO3 (PZO/STO) heterostructure as an example. We discovered a new intensity relationship for LDP-STEM patterns in the PZO/STO heterostructure, which can be well explained by our theory. We also found that, generated by imaging the strain zone, these patterns revealed information that might be obscured in traditional high resolution STEM images, showing a unique advantage in characterizing the strain field. Furthermore, we provided discussions on visualizing the strain field, including the misfit dislocation network and array. Our research offers a novel perspective on the LDP-STEM imaging and clarifies the approach to characterizing the strain field.
资助项目National Natural Science Foundation of China[52122101] ; National Natural Science Foundation of China[51971223] ; Youth Innovation Promotion Association CAS[2021187]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001276416400001
出版者ELSEVIER SCIENCE INC
资助机构National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
源URL  
专题金属研究所_中国科学院金属研究所
通讯作者Wang, Yu-Jia; Zhu, Yin-Lian
作者单位1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Jihua Lab, Foshan 528200, Peoples R China
4.Songshan Lake Mat Lab, Bay Area Ctr Electron Microscopy, Dongguan 523808, Peoples R China
5.Hunan Univ Sci & Technol, Sch Mat Sci & Engn, Xiangtan 411201, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Wen-Tao,Tian, Min,Wang, Yu-Jia,et al. A new insight into largely defocused HAADF-STEM imaging and visualization of strain field[J]. MATERIALS CHARACTERIZATION,2024,215:9.
APA Hu, Wen-Tao,Tian, Min,Wang, Yu-Jia,&Zhu, Yin-Lian.(2024).A new insight into largely defocused HAADF-STEM imaging and visualization of strain field.MATERIALS CHARACTERIZATION,215,9.
MLA Hu, Wen-Tao,et al."A new insight into largely defocused HAADF-STEM imaging and visualization of strain field".MATERIALS CHARACTERIZATION 215(2024):9.

入库方式： OAI收割

来源：金属研究所

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