Strain coupling of ferroelastic domains and misfit dislocations in [101]-oriented ferroelectric PbTiO3 films

doi:10.1039/d2ra03584g

	Strain coupling of ferroelastic domains and misfit dislocations in [101]-oriented ferroelectric PbTiO3 films
	Feng, Y. P.1,2; Jiang, R. J.3,4; Zhu, Y. L.1,2; Tang, Y. L.3; Wang, Y. J.3; Zou, M. J.1,2; Geng, W. R.1,2; Ma, X. L.1,2,5
	2022-07-14
发表期刊	RSC ADVANCES
卷号	12 期号:32 页码:20423-20431
摘要	High-index perovskite ferroelectric thin films possess excellent dielectric permittivity, piezoelectric coefficient, and exotic ferroelectric switching properties. They also exhibit complications in the ferroelastic domains, misfit dislocations, and strain-relaxation behaviors. Exploring the relationship of the ferroelastic domains and misfit dislocations may be of benefit for promoting the high-quality growth of these thin films. Here, the strain field of the ferroelastic domains and misfit dislocations in [101]-oriented PbTiO3/(La, Sr)(Al, Ta)O-3 epitaxial thin films were investigated by advanced aberration-corrected (scanning) transmission electron microscopy (TEM) combined with geometry phase analysis (GPA). Two types of misfit dislocations with projected Burgers vectors of a[001] or a[100] on the (010) plane were elucidated, whose strain fields included in-plane strain and lattice rotation coupled with the c domains above them. Besides, it was demonstrated that the coupling was kept inside the PbTiO3 films when the film thickness was increased. Furthermore, the polarization rotation was observed in both narrow c domains and around the misfit dislocation cores, which may be attributed to the flexoelectric effect. These results are expected to provide useful information for understanding the nucleation and propagation mechanism of ferroelastic domains and for further modifying the growth of high-index ferroelectric thin films.
关键词	Ferroelectric thin films Ferroelectricity High resolution transmission electron microscopy Lead titanate Permittivity Piezoelectricity Scanning electron microscopy Strain C-domain Dielectric permittivities Ferroelastic domains Ferroelectric switching Ferroelectric thin-films Higher index Misfit strains Piezoelectric coefficient Strain fields Switching properties
DOI	10.1039/d2ra03584g
收录类别	SCIE ; EI
语种	英语
WOS研究方向	Chemistry
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:000824728700001
出版者	ROYAL SOC CHEMISTRY
EI入藏号	20223412595407
EI主题词	Perovskite
EI分类号	482.2 Minerals ; 701.1 Electricity: Basic Concepts and Phenomena ; 741.3 Optical Devices and Systems ; 804.2 Inorganic Compounds ; 951 Materials Science
来源库	WOS
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	https://ir.lut.edu.cn/handle/2XXMBERH/159477
专题	兰州理工大学
通讯作者	Zhu, Y. L.
作者单位	1.Bay Area Ctr Electron Microscopy, Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China; 2.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China; 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Peoples R China; 4.Univ Sci & Technol China, Sch Mat Sci & Engn, Wenhua Rd 72, Shenyang 110016, Peoples R China; 5.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Feng, Y. P.,Jiang, R. J.,Zhu, Y. L.,et al. Strain coupling of ferroelastic domains and misfit dislocations in [101]-oriented ferroelectric PbTiO3 films[J]. RSC ADVANCES,2022,12(32):20423-20431.
APA	Feng, Y. P..,Jiang, R. J..,Zhu, Y. L..,Tang, Y. L..,Wang, Y. J..,...&Ma, X. L..(2022).Strain coupling of ferroelastic domains and misfit dislocations in [101]-oriented ferroelectric PbTiO3 films.RSC ADVANCES,12(32),20423-20431.
MLA	Feng, Y. P.,et al."Strain coupling of ferroelastic domains and misfit dislocations in [101]-oriented ferroelectric PbTiO3 films".RSC ADVANCES 12.32(2022):20423-20431.