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

doi:10.1016/j.matchar.2024.114209

IMR OpenIR

	A new insight into largely defocused HAADF-STEM imaging and visualization of strain field
	Hu, Wen-Tao 1,2; Tian, Min 3; Wang, Yu-Jia 1,2; Zhu, Yin-Lian 4,5
通讯作者	Wang, Yu-Jia(yjwang@imr.ac.cn) ; Zhu, Yin-Lian(zhuyinlian@sslab.org.cn)
	2024-09-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	215 页码:9
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.
关键词	HAADF-STEM imaging Imaging heterostructure Largely defocused imaging Misfit dislocation network Visualizing strain field
资助者	National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS
DOI	10.1016/j.matchar.2024.114209
收录类别	SCI
语种	英语
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
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001276416400001
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/188478
专题	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.