Thickness-Dependent Polar Domain Evolution in Strained, Ultrathin PbTiO3 Films

doi:10.1021/acsami.1c20797

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	Thickness-Dependent Polar Domain Evolution in Strained, Ultrathin PbTiO3 Films
	Gong, Feng-Hui 1,3; Chen, Yu-Ting 1,3; Zhu, Yin-Lian 2,3; Tang, Yun-Long 3; Zhang, Heng 1,3; Wang, Yu-Jia 3; Wu, Bo 2; Liu, Jia-Qi 1,3; Shi, Tong-Tong 1,3; Yang, Li-Xin 3
刊名	ACS APPLIED MATERIALS & INTERFACES
	2022-02-09
页码	10
关键词	scanning transmission electron microscopy critical thickness a/c domain meron ultrathin PbTiO3 films
ISSN号	1944-8244
DOI	10.1021/acsami.1c20797
通讯作者	Zhu, Yin-Lian(ylzhu@imr.ac.cn) ; Tang, Yun-Long(yltang@imr.ac.cn)
英文摘要	Ferroelectric ultrathin films have great potential in electronic devices and device miniaturization with the innovation of technology. In the process of product commercialization, understanding the domain evolution and topological properties of ferroelectrics is a prerequisite for high-density storage devices. In this work, a series of ultrathin PbTiO3 (PTO) films with varying thicknesses were deposited on cubic KTaO3 substrates by pulsed laser deposition and were researched by Cs-corrected scanning transmission electron microscopy (STEM), reciprocal space mapping (RSM), and piezoresponse force microscopy (PFM). RSM experiments indicate the existence of a/c domains and show that the lattice constant varies continuously, which is further confirmed by atomic-scale STEM imaging. Diffraction contrast analysis clarifies that with the decrease in PTO film thickness, the critical thickness for the formation of a/c domains could be missing. When the thickness of PTO films is less than 6 nm, the domain configurations in the ultrathin PTO films are the coexistence of a/c domains and bowl-like topological structures, where the latter ones were identified as convergent and divergent types of meron. In addition, abundant 90 degrees charged domain walls in these ultrathin PTO films were identified. PFM studies reveal clear ferroelectric properties for these ultrathin PTO films. These results may shed light on further understanding the domain evolution and topological properties in ultrathin ferroelectric PTO films.
资助项目	National Natural Science Foundation of China[51971223] ; National Natural Science Foundation of China[51922100] ; National Natural Science Foundation of China[52122101] ; Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010] ; Shenyang National Laboratory for Materials Science[L2019R06] ; Shenyang National Laboratory for Materials Science[L2019R08] ; Shenyang National Laboratory for Materials Science[L2019F01] ; Shenyang National Laboratory for Materials Science[L2019F13] ; Scientific Instrument Developing Project of CAS[YJKYYQ20200066] ; Youth Innovation Promotion Association CAS[2021187] ; Youth Innovation Promotion Association CAS[Y202048] ; China National Postdoctoral Program for Innovative Talents[BX2021348] ; China Postdoctoral Science Foundation[2021M703455]
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000758076000001
资助机构	National Natural Science Foundation of China ; Key Research Program of Frontier Sciences CAS ; Shenyang National Laboratory for Materials Science ; Scientific Instrument Developing Project of CAS ; Youth Innovation Promotion Association CAS ; China National Postdoctoral Program for Innovative Talents ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/173311]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhu, Yin-Lian; Tang, Yun-Long
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Songshan Lake Mat Lab, Bay Area Ctr Electron Microscopy, Dongguan 523808, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Gong, Feng-Hui,Chen, Yu-Ting,Zhu, Yin-Lian,et al. Thickness-Dependent Polar Domain Evolution in Strained, Ultrathin PbTiO3 Films[J]. ACS APPLIED MATERIALS & INTERFACES,2022:10.
APA	Gong, Feng-Hui.,Chen, Yu-Ting.,Zhu, Yin-Lian.,Tang, Yun-Long.,Zhang, Heng.,...&Ma, Xiu-Liang.(2022).Thickness-Dependent Polar Domain Evolution in Strained, Ultrathin PbTiO3 Films.ACS APPLIED MATERIALS & INTERFACES,10.
MLA	Gong, Feng-Hui,et al."Thickness-Dependent Polar Domain Evolution in Strained, Ultrathin PbTiO3 Films".ACS APPLIED MATERIALS & INTERFACES (2022):10.