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Coexisting morphotropic phase boundary and giant strain gradient in BiFeO3 films
Tang, Y. L.1; Zhu, Y. L.1,2; Zou, M. J.2,3; Wang, Y. J.1; Ma, X. L.1,4
Corresponding AuthorTang, Y. L.(yltang@imr.ac.cn)
2021-05-14
Source PublicationJOURNAL OF APPLIED PHYSICS
ISSN0021-8979
Volume129Issue:18Pages:6
AbstractLarge compressive strains may introduce giant tetragonality and morphotropic phase boundaries in perovskite BiFeO3 films, where the coexisting tetragonal and rhombohedral phases (T like and R like phases) are identified to exhibit large piezoelectric response. Here, we have further achieved mechanical bending deformations in R like BiFeO3 through its neighboring T like BiFeO3 phases, where a strain gradient of similar to 10(6)/m was identified. Aberration-corrected scanning transmission electron microscopy revealed not only the strain distributions but also the atomic scale Fe polar displacement in the gradient R like BiFeO3. In spite of the giant strain gradient, the polarization direction in each R like BiFeO3 unit cell was found mainly along its diagonal direction, suggesting that potential flexoelectric coupling induced polarization in BiFeO3 is smaller than its spontaneous polarizations, while a large built-in electric field can be obtained via the large strain gradient. Our results indicate that the common phase coexistences in oxide materials could be further manipulated to introduce elastic strain gradients and tune the properties for oxide films.
Funding OrganizationNational Natural Science Foundation of China (NNSFC) ; Key Research Program of Frontier Sciences CAS ; Scientific Instrument Developing Project of CAS ; Youth Innovation Promotion Association of CAS
DOI10.1063/5.0048635
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NNSFC)[51922100] ; National Natural Science Foundation of China (NNSFC)[51971223] ; Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010] ; Scientific Instrument Developing Project of CAS[YJKYYQ20200066] ; Youth Innovation Promotion Association of CAS[Y202048]
WOS Research AreaPhysics
WOS SubjectPhysics, Applied
WOS IDWOS:000649074000002
PublisherAMER INST PHYSICS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/161299
Collection中国科学院金属研究所
Corresponding AuthorTang, Y. L.
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Peoples R China
2.Songshan Lake Mat Lab, Dongguan 523808, Guangdong, Peoples R China
3.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
4.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Langongping Rd 287, Lanzhou 730050, Peoples R China
Recommended Citation
GB/T 7714
Tang, Y. L.,Zhu, Y. L.,Zou, M. J.,et al. Coexisting morphotropic phase boundary and giant strain gradient in BiFeO3 films[J]. JOURNAL OF APPLIED PHYSICS,2021,129(18):6.
APA Tang, Y. L.,Zhu, Y. L.,Zou, M. J.,Wang, Y. J.,&Ma, X. L..(2021).Coexisting morphotropic phase boundary and giant strain gradient in BiFeO3 films.JOURNAL OF APPLIED PHYSICS,129(18),6.
MLA Tang, Y. L.,et al."Coexisting morphotropic phase boundary and giant strain gradient in BiFeO3 films".JOURNAL OF APPLIED PHYSICS 129.18(2021):6.
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