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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
Corresponding AuthorMa, X. L.(xlma@imr.ac.cn)
2018-10-01
Source PublicationULTRAMICROSCOPY
ISSN0304-3991
Volume193Pages:84-89
AbstractTuning 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.
KeywordAberration-corrected high angle annular dark field (HAADF) Ferroelectric film PbZr052Ti048O3/PbTiO3 superlattice Multiple strain states Polarization enhancement
Funding OrganizationNational 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
DOI10.1016/j.ultramic.2018.06.012
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMicroscopy
WOS SubjectMicroscopy
WOS IDWOS:000444834300009
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/129503
Collection中国科学院金属研究所
Corresponding AuthorMa, X. L.
Affiliation1.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
Recommended Citation
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.
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