Epitaxial Strain Enhanced Ferroelectric Polarization toward a Giant Tunneling Electroresistance

doi:10.1021/acsnano.3c10933

IMR OpenIR

	Epitaxial Strain Enhanced Ferroelectric Polarization toward a Giant Tunneling Electroresistance
	Li, Xiaoqi 1,2; Liu, Jiaqi 1,2; Huang, Jianqi 1; Huang, Biaohong 1,2; Li, Lingli 1,2; Li, Yizhuo 1; Hu, Wentao 1,2; Li, Changji 1; Ali, Sajjad 3; Yang, Teng 1,2; Xue, Fei 4; Han, Zheng 5,6; Tang, Yun-Long 1,2; Hu, Weijin 1,2; Zhang, Zhidong 1
通讯作者	Yang, Teng(yangteng@imr.ac.cn) ; Hu, Weijin(wjhu@imr.ac.cn)
	2024-03-04
发表期刊	ACS NANO
ISSN	1936-0851
卷号	18 期号:11 页码:7989-8001
摘要	A substantial ferroelectric polarization is the key for designing high-performance ferroelectric nonvolatile memories. As a promising candidate system, the BaTiO3/La0.67Sr0.33MnO3 (BTO/LSMO) ferroelectric/ferromagnetic heterostructure has attracted a lot of attention thanks to the merits of high Curie temperature, large spin polarization, and low ferroelectric coercivity. Nevertheless, the BTO/LSMO heterostructure suffers from a moderate FE polarization, primarily due to the quick film-thickness-driven strain relaxation. In response to this challenge, we propose an approach for enhancing the FE properties of BTO films by using a Sr3Al2O6 (SAO) buffering layer to mitigate the interfacial strain relaxation. The continuously tunable strain allows us to illustrate the linear dependence of polarization on epitaxial strain with a large strain-sensitive coefficient of similar to 27 mu C/cm(2) per percent strain. This results in a giant polarization of similar to 80 mu C/cm(2) on the BTO/LSMO interface. Leveraging this large polarization, we achieved a giant tunneling electroresistance (TER) of similar to 10(5) in SAO-buffered Pt/BTO/LSMO ferroelectric tunnel junctions (FTJs). Our research uncovers the fundamental interplay between strain, polarization magnitude, and device performance, such as on/off ratio, thereby advancing the potential of FTJs for next-generation information storage applications.
关键词	epitaxial strain BaTiO3 Sr3Al2O6 strain-sensitivecoefficient ferroelectric tunnel junction spontaneouspolarization tunneling electroresistance
资助者	Special Fund for Central Government Guiding the Local Development of Science and Technology ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; Special Fund for Central Government Guiding the Local Development of Science and Technology ; Prince Sultan University
DOI	10.1021/acsnano.3c10933
收录类别	SCI
语种	英语
资助项目	Special Fund for Central Government Guiding the Local Development of Science and Technology[2022YFA1203903] ; National Key R&D Program of China[61974147] ; National Key R&D Program of China[52031014] ; National Natural Science Foundation of China (NSFC)[2023JH6/100100063] ; Special Fund for Central Government Guiding the Local Development of Science and Technology ; Prince Sultan University
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:001180344300001
出版者	AMER CHEMICAL SOC
引用统计	被引频次：8[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/321006/184708
专题	中国科学院金属研究所
通讯作者	Yang, Teng; Hu, Weijin
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Prince Sultan Univ, Coll Humanities & Sci, Energy Water & Environm Lab, Riyadh 11586, Saudi Arabia 4.Zhejiang Univ, ZJU Hangzhou Global Sci & Technol Innovat Ctr, Sch Micronano Elect, Hangzhou 311215, Peoples R China 5.Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China 6.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiaoqi,Liu, Jiaqi,Huang, Jianqi,et al. Epitaxial Strain Enhanced Ferroelectric Polarization toward a Giant Tunneling Electroresistance[J]. ACS NANO,2024,18(11):7989-8001.
APA	Li, Xiaoqi.,Liu, Jiaqi.,Huang, Jianqi.,Huang, Biaohong.,Li, Lingli.,...&Zhang, Zhidong.(2024).Epitaxial Strain Enhanced Ferroelectric Polarization toward a Giant Tunneling Electroresistance.ACS NANO,18(11),7989-8001.
MLA	Li, Xiaoqi,et al."Epitaxial Strain Enhanced Ferroelectric Polarization toward a Giant Tunneling Electroresistance".ACS NANO 18.11(2024):7989-8001.