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

doi:10.1039/d2ra03584g

CORC > 兰州理工大学 > 兰州理工大学

	Strain coupling of ferroelastic domains and misfit dislocations in [101]-oriented ferroelectric PbTiO3 films
	Feng, Y. P.2,3; Jiang, R. J.1,4; Zhu, Y. L.2,3; Tang, Y. L.4; Wang, Y. J.4; Zou, M. J.2,3; Geng, W. R.2,3; Ma, X. L.2,3,5
刊名	RSC ADVANCES
	2022-07-14
卷号	12 期号:32 页码:20423-20431
DOI	10.1039/d2ra03584g
英文摘要	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.
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000824728700001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159477]
专题	兰州理工大学
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Wenhua Rd 72, Shenyang 110016, Peoples R China; 2.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China; 3.Bay Area Ctr Electron Microscopy, Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China; 4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 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.