Multiple strains and polar states in PbZr0.52Ti0.48O3/PbTiO3 superlattices revealed by aberration-corrected HAADF-STEM imaging

doi:10.1016/j.ultramic.2018.06.012

IMR OpenIR

	Multiple strains and polar states in PbZr0.52Ti0.48O3/PbTiO3 superlattices revealed by aberration-corrected HAADF-STEM imaging
	Tang, Y. L.1; Zhu, Y. L.1; Wang, Y. J.1; Ma, X. L.1,2
通讯作者	Ma, X. L.(xlma@imr.ac.cn)
	2018-10-01
发表期刊	ULTRAMICROSCOPY
ISSN	0304-3991
卷号	193 页码:84-89
摘要	Tuning multiple strain and polar states of ferroelectrics by using strain engineering is an essential approach for designing multifunctional electric devices such as multiple state memories. However, integrating multiple strain states is still a challenge, and in addition, revealing such strains and the resultant polar behaviors on the atomic level remains difficult. In this work we prepare PbZr0.52Ti0.48O3/PbTiO3 (PZT/PTO) superlattices on SrRuO3-buffered SrTiO3 (001) substrates. Aberration-corrected high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) reveals that the superlattice is coherent in both c (out-of-plane polar direction) and a (in-plane polar direction) domains. We find that the strain states of both PZT and PTO in c and a domains are variant, leading to four special strain states. For example, the tetragonality for PTO in c and a domains is 1.061 and 1.045, respectively. In contrast, PZT in c domains displays a tetragonality as giant as 1.107, which corresponds to 110 mu C cm(-2) spontaneous polarization, much larger than the bulk PZT; while PZT in a domains exhibits 1.010 tetragonality with about 70 mu C cm(-2) polarization. This study reveals a practical way to integrate multiple strain states and enhanced polarizations in ferroelectric films, which could be used as multifunctional electric elements.
关键词	Aberration-corrected high angle annular dark field (HAADF) Ferroelectric film PbZr052Ti048O3/PbTiO3 superlattice Multiple strain states Polarization enhancement
资助者	National Natural Science Foundation of China ; National Basic Research Program of China ; Key Research Program of Frontier Sciences CAS ; Youth Innovation Promotion Association CAS ; IMR SYNL-T. S. Kc Research Fellowship
DOI	10.1016/j.ultramic.2018.06.012
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51501194] ; National Natural Science Foundation of China[51571197] ; National Natural Science Foundation of China[51671194] ; National Natural Science Foundation of China[51401212] ; National Natural Science Foundation of China[51521091] ; National Basic Research Program of China[2014CB921002] ; Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010] ; Youth Innovation Promotion Association CAS[2016177] ; IMR SYNL-T. S. Kc Research Fellowship
WOS研究方向	Microscopy
WOS类目	Microscopy
WOS记录号	WOS:000444834300009
出版者	ELSEVIER SCIENCE BV
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/321006/129506
专题	中国科学院金属研究所
通讯作者	Ma, X. L.
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Liaoning, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Non Ferrous Me, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Tang, Y. L.,Zhu, Y. L.,Wang, Y. J.,et al. Multiple strains and polar states in PbZr0.52Ti0.48O3/PbTiO3 superlattices revealed by aberration-corrected HAADF-STEM imaging[J]. ULTRAMICROSCOPY,2018,193:84-89.
APA	Tang, Y. L.,Zhu, Y. L.,Wang, Y. J.,&Ma, X. L..(2018).Multiple strains and polar states in PbZr0.52Ti0.48O3/PbTiO3 superlattices revealed by aberration-corrected HAADF-STEM imaging.ULTRAMICROSCOPY,193,84-89.
MLA	Tang, Y. L.,et al."Multiple strains and polar states in PbZr0.52Ti0.48O3/PbTiO3 superlattices revealed by aberration-corrected HAADF-STEM imaging".ULTRAMICROSCOPY 193(2018):84-89.