| 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 Author | Morozovska, A. N.(anna.n.morozovska@gmail.com) |
| 2019-09-11 | |
| Source Publication | PHYSICAL REVIEW B
 |
| ISSN | 2469-9950 |
| Volume | 100Issue:10Pages:14 |
| Abstract | The 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 Organization | Key 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 |
| DOI | 10.1103/PhysRevB.100.104109 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Key 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 Area | Materials Science ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| WOS ID | WOS:000485191700001 |
| Publisher | AMER PHYSICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/135432 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Morozovska, A. N. |
| Affiliation | 1.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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