Vertical Strain Engineering of Epitaxial La2/3Sr1/3MnO3 Thin Films by Spontaneously Embedding ZrO2 Nanopillar Arrays

doi:10.1002/admi.202001355

IMR OpenIR

	Vertical Strain Engineering of Epitaxial La2/3Sr1/3MnO3 Thin Films by Spontaneously Embedding ZrO2 Nanopillar Arrays
	Cao, Guixin; Song, Kepeng; Qiao, Liang; Guo, Junjie; Han, Weihua; Shen, Xuechu; Du, Kui; Zhang, Jincang; Singh, David J.; Gao, Yuze
	2020-12-15
发表期刊	ADVANCED MATERIALS INTERFACES
摘要	Rational control of local strain distributions and thus the functional properties of epitaxial thin films has been a long-standing goal in the development of new physics and novel devices based on strain-sensitive materials. Here, the fabrication of La2/3Sr1/3MnO3 (LSMO) films with strain fields arising from vertical epitaxial embedding of ultra-small ZrO2 nanopillars, diameter 4.0 +/- 0.6 nm, is reported. High quality films are obtained with average distance between adjacent nanopillars of 9.0 +/- 0.3 nm for x = 0.2 in (LSMO)(1-)(x):(ZrO2)(x). The strain distribution of the vertical interface is analyzed in detail and the dominant state of the interfacial strain is verified. Remarkably, with increasing x, the Curie temperature T-C and metal-insulator (MI) transition temperature T-MI show a surprisingly large depression, revealing the significant tuning capability of the vertical tensile stress originating from the small-size ZrO2 pillars. A systematic tunability of the low field magnetoresistance is also found. The field dependence of the magnetization exhibits both horizontal and vertical shifts. The exchange bias field H-E increases with increasing x, while magnetization shift M-shift is unchanged. The results suggest the possibility of strain tuning through epitaxial nanostructures for multifunctional applications across many fields with appropriate selection of matrix and nanopillar materials.
DOI	10.1002/admi.202001355
WOS记录号	WOS:000598645700001
引用统计	被引频次：1[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/321006/155641
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Cao, Guixin,Song, Kepeng,Qiao, Liang,et al. Vertical Strain Engineering of Epitaxial La2/3Sr1/3MnO3 Thin Films by Spontaneously Embedding ZrO2 Nanopillar Arrays[J]. ADVANCED MATERIALS INTERFACES,2020.
APA	Cao, Guixin.,Song, Kepeng.,Qiao, Liang.,Guo, Junjie.,Han, Weihua.,...&Gao, Yuze.(2020).Vertical Strain Engineering of Epitaxial La2/3Sr1/3MnO3 Thin Films by Spontaneously Embedding ZrO2 Nanopillar Arrays.ADVANCED MATERIALS INTERFACES.
MLA	Cao, Guixin,et al."Vertical Strain Engineering of Epitaxial La2/3Sr1/3MnO3 Thin Films by Spontaneously Embedding ZrO2 Nanopillar Arrays".ADVANCED MATERIALS INTERFACES (2020).