Thickness-Dependent Evolution of Piezoresponses and Stripe 90 degrees Domains in (101)-Oriented Ferroelectric PbTiO3 Thin Films

doi:10.1021/acsami.8b07206

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	Thickness-Dependent Evolution of Piezoresponses and Stripe 90 degrees Domains in (101)-Oriented Ferroelectric PbTiO3 Thin Films
	Feng, Yanpeng 3,4; Tang, Yunlong 3; Ma, Desheng 1; Zhu, Yinlian 3; Zou, Minjie 3,5; Han, Mengjiao 3,4; Ma, Jinyuan 2,3; Ma, Xiuliang 2,3
刊名	ACS APPLIED MATERIALS & INTERFACES
	2018-07-25
卷号	10 期号:29 页码:24627-24637
关键词	ferroelectric thin films PbTiO3 stripe 90 degrees domain piezoresponse TEM
ISSN号	1944-8244
DOI	10.1021/acsami.8b07206
通讯作者	Zhu, Yinlian(ylzhu@imr.ac.cn)
英文摘要	High-index ferroelectric films as (101)-orientated ones exhibit enhanced dielectric responses, piezoelectric responses, and exotic ferroelectric switching behaviors, which are potential candidates for applications in memories and capacitors. However, possible domain patterns and domain wall structures in (101)-oriented ferroelectric thin films are still elusive, which results in difficulties in understanding the origin and further modulating their special properties. In this work, a series of PbTiO3 (PTO) thin films with 35, 50, 60, and 70 nm in thickness were grown on (101)-oriented (LaAlO3)(0.29)(SrTa1/2Al1/2O3)(0.71)(LSAT(101)) substrates by pulsed laser deposition and investigated by both piezoresponse force microscopy (PFM) and (scanning) transmission electron microscopy ((S)TEM). PFM measurements reveal that periodic stripe domains are dominant in 50 nm thick PTO films. Besides stripe domains, a/c domains appear in films with thickness more than 60 nm. A thickness-dependent evolution of piezoresponse amplitude indicates that the S0 nm thick PTO films demonstrate a superior piezoresponse. Electron diffraction and contrast analysis clarify that all these (101)-oriented PTO films contain periodic stripe ferroelectric 90 degrees domains. The domain periods increase with the film thickness following Kittel's law. Aberration-corrected STEM imaging reveals that the stripe ferroelectric 90 degrees domains have an alternate arrangement of wide and narrow c domains with polarization directions along [100] for c(1) domains and [00 (1) over bar] for c(2) domains, forming a "head-to-tail" polarization configuration. Further strain analysis reveals that stripe domains have uniform strain distributions and distinct lattice rotations around domain walls. It is proposed that the periodic arrangement of high-density stripe 90 degrees domains in 50 nm thick PTO films is the main contributor to the superior piezoresponse behavior. These results are expected to provide useful information to understand the domain structures in (101)-oriented PTO thin films and thus facilitate further modulation of the properties for potential applications.
资助项目	National Natural Science Foundation of China[51571197] ; National Natural Science Foundation of China[51501194] ; National Natural Science Foundation of China[51671194] ; National Basic Research Program of China[2014CB921002] ; Key Research Program of Frontier Sciences CAS[QYZDJ-SSW-JSC010] ; Youth Innovation Promotion Association CAS[2016177]
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:000440511900035
资助机构	National Natural Science Foundation of China ; National Basic Research Program of China ; Key Research Program of Frontier Sciences CAS ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/128776]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhu, Yinlian
作者单位	1.Nankai Univ, Sch Phys, Weijin Rd 94, Tianjin 300071, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Langongping Rd 287, Lanzhou 730050, Gansu, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Wenhua Rd 72, Shenyang 110016, Liaoning, Peoples R China 4.Univ Chinese Acad Sci, Yuquan Rd 19, Beijing 100049, Peoples R China 5.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Feng, Yanpeng,Tang, Yunlong,Ma, Desheng,et al. Thickness-Dependent Evolution of Piezoresponses and Stripe 90 degrees Domains in (101)-Oriented Ferroelectric PbTiO3 Thin Films[J]. ACS APPLIED MATERIALS & INTERFACES,2018,10(29):24627-24637.
APA	Feng, Yanpeng.,Tang, Yunlong.,Ma, Desheng.,Zhu, Yinlian.,Zou, Minjie.,...&Ma, Xiuliang.(2018).Thickness-Dependent Evolution of Piezoresponses and Stripe 90 degrees Domains in (101)-Oriented Ferroelectric PbTiO3 Thin Films.ACS APPLIED MATERIALS & INTERFACES,10(29),24627-24637.
MLA	Feng, Yanpeng,et al."Thickness-Dependent Evolution of Piezoresponses and Stripe 90 degrees Domains in (101)-Oriented Ferroelectric PbTiO3 Thin Films".ACS APPLIED MATERIALS & INTERFACES 10.29(2018):24627-24637.