Interfacial Strain Gradients Control Nanoscale Domain Morphology in Epitaxial BiFeO3 Multiferroic Films

doi:10.1002/adfm.202000343

IMR OpenIR

	Interfacial Strain Gradients Control Nanoscale Domain Morphology in Epitaxial BiFeO3 Multiferroic Films
	Sando, Daniel 1,2; Han, Mengjiao 3,4; Govinden, Vivasha 1; Paull, Oliver 1; Appert, Florian 5; Carretero, Cecile 6; Fischer, Johanna 6; Barthelemy, Agnes 6; Bibes, Manuel 6; Garcia, Vincent 6; Fusil, Stephane 6; Dkhil, Brahim 7; Juraszek, Jean 5; Zhu, Yinlian 3; Ma, Xiuliang 3; Nagarajan, Valanoor 1
通讯作者	Sando, Daniel(daniel.sando@unsw.edu.au) ; Nagarajan, Valanoor(nagarajan@unsw.edu.au)
	2020-05-01
发表期刊	ADVANCED FUNCTIONAL MATERIALS
ISSN	1616-301X
卷号	30 期号:22 页码:10
摘要	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.
关键词	BiFeO3 domain structures interface effects multiferroics strain gradients thin films
DOI	10.1002/adfm.202000343
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000537167400016
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：23[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/321006/139054
专题	中国科学院金属研究所
通讯作者	Sando, Daniel; Nagarajan, Valanoor
作者单位	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
推荐引用方式 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.