| Interfacial Strain Gradients Control Nanoscale Domain Morphology in Epitaxial BiFeO3 Multiferroic Films | |
| Sando, Daniel1,2; Han, Mengjiao3,4; Govinden, Vivasha1; Paull, Oliver1; Appert, Florian5; Carretero, Cecile6; Fischer, Johanna6; Barthelemy, Agnes6; Bibes, Manuel6; Garcia, Vincent6; Fusil, Stephane6; Dkhil, Brahim7; Juraszek, Jean5; Zhu, Yinlian3; Ma, Xiuliang3; Nagarajan, Valanoor1 | |
| Corresponding Author | Sando, Daniel(daniel.sando@unsw.edu.au) ; Nagarajan, Valanoor(nagarajan@unsw.edu.au) |
| 2020-05-01 | |
| Source Publication | ADVANCED FUNCTIONAL MATERIALS
 |
| ISSN | 1616-301X |
| Volume | 30Issue:22Pages:10 |
| Abstract | Domain switching pathways fundamentally control performance in ferroelectric thin film devices. In epitaxial bismuth ferrite (BiFeO3) films, the domain morphology is known to influence the multiferroic orders. While both striped and mosaic domains have been observed, the origins of the latter have remained unclear. Here, it is shown that domain morphology is defined by the strain profile across the film-substrate interface. In samples with mosaic domains, X-ray diffraction analysis reveals strong strain gradients, while geometric phase analysis using scanning transmission electron microscopy finds that within 5 nm of the film-substrate interface, the out-of-plane strain shows an anomalous dip while the in-plane strain is constant. Conversely, if uniform strain is maintained across the interface with zero strain gradient, striped domains are formed. Critically, an ex situ thermal treatment, which eliminates the interfacial strain gradient, converts the domains from mosaic to striped. The antiferromagnetic state of the BiFeO3 is also influenced by the domain structure, whereby the mosaic domains disrupt the long-range spin cycloid. This work demonstrates that atomic scale tuning of interfacial strain gradients is a powerful route to manipulate the global multiferroic orders in epitaxial films. |
| Keyword | BiFeO3 domain structures interface effects multiferroics strain gradients thin films |
| DOI | 10.1002/adfm.202000343 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| WOS Subject | Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| WOS ID | WOS:000537167400016 |
| Publisher | WILEY-V C H VERLAG GMBH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/139054 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Sando, Daniel; Nagarajan, Valanoor |
| Affiliation | 1.UNSW Sydney, Sch Mat Sci & Engn, High St, Kensington, NSW 2052, Australia 2.UNSW Sydney, Mark Wainwright Analyt Ctr, High St, Kensington, NSW 2052, Australia 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Peoples R China 4.Univ Chinese Acad Sci, Yuquan Rd 19, Beijing 100049, Peoples R China 5.Normandie Univ, UNIROUEN, INSA Rouen, CNRS,GPM, F-76000 Rouen, France 6.Univ Paris Sud, Thales, CNRS, Unite Mixte Phys, F-91120 Palaiseau, France 7.Univ Paris Saclay, Cent Supelec, CNRS, Lab Struct Proprietes & Modelisat Solides,UMR8580, F-91190 Gif Sur Yvette, France |
| Recommended Citation GB/T 7714 | Sando, Daniel,Han, Mengjiao,Govinden, Vivasha,et al. Interfacial Strain Gradients Control Nanoscale Domain Morphology in Epitaxial BiFeO3 Multiferroic Films[J]. ADVANCED FUNCTIONAL MATERIALS,2020,30(22):10. |
| APA | Sando, Daniel.,Han, Mengjiao.,Govinden, Vivasha.,Paull, Oliver.,Appert, Florian.,...&Nagarajan, Valanoor.(2020).Interfacial Strain Gradients Control Nanoscale Domain Morphology in Epitaxial BiFeO3 Multiferroic Films.ADVANCED FUNCTIONAL MATERIALS,30(22),10. |
| MLA | Sando, Daniel,et al."Interfacial Strain Gradients Control Nanoscale Domain Morphology in Epitaxial BiFeO3 Multiferroic Films".ADVANCED FUNCTIONAL MATERIALS 30.22(2020):10. |
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