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Mapping gradient-driven morphological phase transition at the conductive domain walls of strained multiferroic films
Han, M. J.1,2; Eliseev, E. A.3; Morozovska, A. N.4; Zhu, Y. L.1; Tang, Y. L.1; Wang, Y. J.1; Guo, X. W.1,5; Ma, X. L.1,6
Corresponding AuthorMorozovska, A. N.(anna.n.morozovska@gmail.com)
2019-09-11
Source PublicationPHYSICAL REVIEW B
ISSN2469-9950
Volume100Issue:10Pages:14
AbstractThe coupling between antiferrodistortion (AFD) and ferroelectric (FE) polarization, universal for all tilted perovskite multiferroics, is known to strongly correlate with domain wall functionalities in the materials. The intrinsic mechanisms of domain wall phenomena, especially AFD-FE coupling-induced phenomena at the domain walls, have continued to intrigue the scientific and technological communities because of the need to develop future nanoscale electronic devices. Over the past years, theoretical studies have often shown controversial results, owing to the fact that they are neither sufficiently nor directly corroborated with experimental evidence. In this work, the AFD-FE coupling at uncharged 180 degrees and 71 degrees domain walls in BiFeO3 films is investigated by means of aberration-corrected scanning transmission electron microscopy with high-resolution scanning transmission electron microscopy and rationalized by phenomenological Landau-Ginzburg-Devonshire (LGD) theory. We reveal a peculiar morphology at the AFD-FE walls, including kinks, meandering, and trianglelike regions with opposite oxygen displacements and curvature near the interface. The LGD theory confirms that the tilt gradient energy induces these unusual morphologies and the features would change delicately with different kinds of domain walls. Moreover, the 180 degrees AFD-FE walls are proved to be conductive with an unexpected reduction of the Fe-O-Fe bond angle, which is distinct from theoretical predictions. By exploring AFD-FE coupling at the domain walls, and its induced functionalities, we provide exciting evidence into the links between structural distortions and its electronic properties, which provide great benefit for fundamental understanding of domain wall functionalities as well as functional manipulations for novel nanodevices.
Funding OrganizationKey Research Program of Frontier Sciences CAS ; National Natural Science Foundation of China ; National Basic Research Program of China ; IMR SYNL-T.S. Ke Research Fellowship ; Youth Innovation Promotion Association CAS ; National Academy of Sciences of Ukraine ; European Union
DOI10.1103/PhysRevB.100.104109
Indexed BySCI
Language英语
Funding ProjectKey Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010] ; National Natural Science Foundation of China[51671194] ; National Natural Science Foundation of China[51571197] ; National Basic Research Program of China[2014CB921002] ; IMR SYNL-T.S. Ke Research Fellowship ; Youth Innovation Promotion Association CAS[2016177] ; National Academy of Sciences of Ukraine[0117U002612] ; European Union[778070]
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS IDWOS:000485191700001
PublisherAMER PHYSICAL SOC
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/135432
Collection中国科学院金属研究所
Corresponding AuthorMorozovska, A. N.
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Natl Acad Sci Ukraine, Inst Problems Mat Sci, Krjijanovskogo 3, UA-03142 Kiev, Ukraine
4.Natl Acad Sci Ukraine, Inst Phys, 46 Prospekt Nauky, UA-03028 Kiev, Ukraine
5.Univ Sci & Technol China, Jinzhai Rd 96, Hefei 230026, Anhui, Peoples R China
6.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Gansu, Peoples R China
Recommended Citation
GB/T 7714
Han, M. J.,Eliseev, E. A.,Morozovska, A. N.,et al. Mapping gradient-driven morphological phase transition at the conductive domain walls of strained multiferroic films[J]. PHYSICAL REVIEW B,2019,100(10):14.
APA Han, M. J..,Eliseev, E. A..,Morozovska, A. N..,Zhu, Y. L..,Tang, Y. L..,...&Ma, X. L..(2019).Mapping gradient-driven morphological phase transition at the conductive domain walls of strained multiferroic films.PHYSICAL REVIEW B,100(10),14.
MLA Han, M. J.,et al."Mapping gradient-driven morphological phase transition at the conductive domain walls of strained multiferroic films".PHYSICAL REVIEW B 100.10(2019):14.
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