Oxygen vacancy enhanced ferroelectricity in BTO:SRO nanocomposite films

doi:10.1016/j.actamat.2020.08.016

IMR OpenIR

	Oxygen vacancy enhanced ferroelectricity in BTO:SRO nanocomposite films
	Lin, Jun Liang 1,3; He, Ri 2; Lu, Zengxing 2; Lu, Yi 4; Wang, Zhiming 2; Zhong, Zhicheng 2; Zhao, Xiang 1; Li, Run-Wei 2; Zhang, Zhi Dong 3; Wang, Zhan Jie 5
通讯作者	Zhong, Zhicheng(zhong@nimte.ac.cn) ; Wang, Zhan Jie(wangzj@imr.ac.cn)
	2020-10-15
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	199 页码:9-18
摘要	The enhancement of ferroelectric properties in lead-free ferroelectric is usually achieved by strain engineering. Here, we report a surprising polarization enhancement effect in an isostructural ferroelectric nanocomposite system composited by the ferroelectric material of BaTiO3 and metallic non-ferroelectric oxide of SrRuO3. BaTiO3:SrRuO3 (BTO:SRO) ferroelectric nanocomposite films with the volume ratio of nanogranular SRO ranging from 0 to 16% grown on the Nb-doped SrTiO3 (NSTO) single-crystal substrates by pulsed laser deposition (PLD) are investigated. Robust ferroelectric polarization is observed with a remanent polarization of about 40 mu C/cm(2), comparable to those found in Pb(ZrxTi1-x)O-3 thin films. By combining X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), density functional theory (DFT) calculations, and phase-field simulation, a hypothesis has been proposed that the polarization enhancement may be mainly attributed to the accumulation of oxygen vacancies at the BTO/SRO interface rather than lattice mismatch strain. The novel mechanism of polarization enhancement opens new possibilities for designing future ferroelectric devices. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Nanocomposite Ferroelectricity Laser deposition Oxygen vacancy First-principles calculations
资助者	basic scientific research projects of colleges and universities of Liaoning Province ; major project of Industrial Technology Research Institute of Liaoning Colleges and Universities ; National Basic Research Program of China ; National Key R and D Program of China ; National Nature Science Foundation of China
DOI	10.1016/j.actamat.2020.08.016
收录类别	SCI
语种	英语
资助项目	basic scientific research projects of colleges and universities of Liaoning Province[LZGD2017005] ; major project of Industrial Technology Research Institute of Liaoning Colleges and Universities[201824010] ; National Basic Research Program of China[2017YFA0206302] ; National Key R and D Program of China[2017YFA0303602] ; National Nature Science Foundation of China[11774360]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000577994500002
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：21[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/321006/141014
专题	中国科学院金属研究所
通讯作者	Zhong, Zhicheng; Wang, Zhan Jie
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Magnet Mat & Devices, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Ningbo 315201, Peoples R China 3.Chinese Acad Sci, Inst Met Res IMR, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 4.Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany 5.Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Peoples R China
推荐引用方式 GB/T 7714	Lin, Jun Liang,He, Ri,Lu, Zengxing,et al. Oxygen vacancy enhanced ferroelectricity in BTO:SRO nanocomposite films[J]. ACTA MATERIALIA,2020,199:9-18.
APA	Lin, Jun Liang.,He, Ri.,Lu, Zengxing.,Lu, Yi.,Wang, Zhiming.,...&Wang, Zhan Jie.(2020).Oxygen vacancy enhanced ferroelectricity in BTO:SRO nanocomposite films.ACTA MATERIALIA,199,9-18.
MLA	Lin, Jun Liang,et al."Oxygen vacancy enhanced ferroelectricity in BTO:SRO nanocomposite films".ACTA MATERIALIA 199(2020):9-18.