Coexisting morphotropic phase boundary and giant strain gradient in BiFeO3 films

doi:10.1063/5.0048635

IMR OpenIR

	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
通讯作者	Tang, Y. L.(yltang@imr.ac.cn)
	2021-05-14
发表期刊	JOURNAL OF APPLIED PHYSICS
ISSN	0021-8979
卷号	129 期号:18 页码:6
摘要	Large 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.
资助者	National 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
DOI	10.1063/5.0048635
收录类别	SCI
语种	英语
资助项目	National 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研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:000649074000002
出版者	AMER INST PHYSICS
引用统计	被引频次：4[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/321006/161299
专题	中国科学院金属研究所
通讯作者	Tang, Y. L.
作者单位	1.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
推荐引用方式 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.