Interfacial Control of Ferromagnetism in Ultrathin SrRuO3 Films Sandwiched between Ferroelectric BaTiO3 Layers

doi:10.1021/acsami.9b20941

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	Interfacial Control of Ferromagnetism in Ultrathin SrRuO3 Films Sandwiched between Ferroelectric BaTiO3 Layers
	Gu, Youdi 1,2; Song, Cheng 1; Zhang, Qinghua 3; Li, Fan 4; Tan, Hengxin 4; Xu, Kun 5; Li, Jia 3; Saleem, Muhammad Shahrukh 1; Fayaz, Muhammad Umer 1; Peng, Jingjing 6
刊名	ACS APPLIED MATERIALS & INTERFACES
	2020-02-05
卷号	12 期号:5 页码:6707-6715
关键词	SrRuO3 sandwich heterostructure synergistic ferroelectric proximity effect enhanced magnetism spin-state transition ferroelectric-like lattice distortions
ISSN号	1944-8244
DOI	10.1021/acsami.9b20941
通讯作者	Song, Cheng(songcheng@mail.tsinghua.edu.cn) ; Liu, Wei(wliu@imr.ac.cn)
英文摘要	Interfaces between materials provide an intellectually rich arena for fundamental scientific discovery and device design. However, the frustration of magnetization and conductivity of perovskite oxide films under reduced dimensionality is detrimental to their device performance, preventing their active low-dimensional application. Herein, by inserting the ultrathin 4d ferromagnetic SrRuO3 layer between ferroelectric BaTiO3 layers to form a sandwich heterostructure, we observe enhanced physical properties in ultrathin SrRuO3 films, including longitudinal conductivity, Curie temperature, and saturated magnetic moment. Especially, the saturated magnetization can be enhanced to similar to 3.12 mu(B)/Ru in ultrathin BaTiO3/SrRuO3/BaTiO3 trilayers, which is beyond the theoretical limit of bulk value (2 mu(B)/Ru). This observation is attributed to the synergistic ferroelectric proximity effect (SFPE) at upper and lower BaTiO3/SrRuO3 heterointerfaces, as revealed by the high-resolution lattice structure analysis. This SFPE in dual-ferroelectric interface cooperatively induces ferroelectric-like lattice distortions in RuO6 oxygen octahedra and subsequent spin-state crossover in SrRuO3, which in turn accounts for the observed enhanced magnetization. Besides the fundamental significance of interface-induced spin-lattice coupling, our findings also provide a viable route to the electrical control of magnetic ordering, taking a step toward low-power applications in all-oxide spintronics.
资助项目	Beijing Innovation Center for Future Chip (ICFC), Tsinghua University ; Young Chang Jiang Scholars Program ; National Key R&D Program of China[2017YFB0405704] ; National Natural Science Foundation of China[51671110] ; National Natural Science Foundation of China[51802297] ; National Natural Science Foundation of China[51571128]
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:000512216900158
资助机构	Beijing Innovation Center for Future Chip (ICFC), Tsinghua University ; Young Chang Jiang Scholars Program ; National Key R&D Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/137245]
专题	金属研究所_中国科学院金属研究所
通讯作者	Song, Cheng; Liu, Wei
作者单位	1.Tsinghua Univ, Key Lab Adv Mat MOE, Sch Mat Sci & Engn, Beijing 100084, Peoples R China 2.Univ Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Chinese Acad Sci, Shenyang 110016, Peoples R China 3.Univ Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Chinese Acad Sci, Beijing 100190, Peoples R China 4.Max Planck Inst Microstruct Phys, D-06120 Halle, Saale, Germany 5.Tsinghua Univ, Natl Ctr Electron Microscopy Beijing, Sch Mat Sci & Engn, Beijing 100084, Peoples R China 6.Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China
推荐引用方式 GB/T 7714	Gu, Youdi,Song, Cheng,Zhang, Qinghua,et al. Interfacial Control of Ferromagnetism in Ultrathin SrRuO3 Films Sandwiched between Ferroelectric BaTiO3 Layers[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12(5):6707-6715.
APA	Gu, Youdi.,Song, Cheng.,Zhang, Qinghua.,Li, Fan.,Tan, Hengxin.,...&Pan, Feng.(2020).Interfacial Control of Ferromagnetism in Ultrathin SrRuO3 Films Sandwiched between Ferroelectric BaTiO3 Layers.ACS APPLIED MATERIALS & INTERFACES,12(5),6707-6715.
MLA	Gu, Youdi,et al."Interfacial Control of Ferromagnetism in Ultrathin SrRuO3 Films Sandwiched between Ferroelectric BaTiO3 Layers".ACS APPLIED MATERIALS & INTERFACES 12.5(2020):6707-6715.