Interfacial Octahedral Rotation Mismatch Control of the Symmetry and Properties of SrRuO3

被引：66

作者：

Gao, Ran ^{[1
]}

Dong, Yongqi ^{[2
,3
]}

Xu, Han ^{[2
,3
]}

Zhou, Hua ^{[4
]}

Yuan, Yakun ^{[5
]}

Gopalan, Venkatraman ^{[5
]}

Gao, Chen ^{[2
,3
]}

Fong, Dillon D. ^{[6
]}

Chen, Zuhuang ^{[1
,7
]}

Luo, Zhenlin ^{[2
,3
]}

Martin, Lane W. ^{[1
,7
]}

机构：

[1] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[2] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, CAS Key Lab Mat Energy Convers, Hefei 230026, Anhui, Peoples R China

[4] Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA

[5] Penn State Univ, Dept Mat Sci & Engn, State Coll, PA 16802 USA

[6] Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA

[7] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2016年 / 8卷 / 23期

基金：

中国国家自然科学基金;

关键词：

SrRuO3; epitaxial strain; octahedral rotation; interfacial engineering; crystal symmetry; THIN-FILMS; OXIDE; PEROVSKITES; DISTORTIONS;

D O I：

10.1021/acsami.6b02864

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Epitaxial Strain can be used to tune the properties of complex oxides with perovskite structure. Beyond just lattice mismatch, the use of octahedral rotation mismatch at heterointerfaces could also provide an effective route to manipulate material properties. Here, we examine the evolution of the structural motif (i.e., lattice parameters, symmetry, and octahedral: rotations) of SrRuO3 films grown on substrates engineered to have the same lattice parameters, but different octahedral rotations. SrRuO3 films grown on SrTiO3 (001) (no octahedral rotations) and GdScO3 buffered SrTiO3 (001) (with octahedral rotations) substrates are found to exhibit monoclinic and tetragonal symmetry, respectively. Electrical transport and magnetic measurements reveal that the tetragonal films exhibit higher resistivity, lower magnetic Curie temperatures) and more isotropic magnetism as compared to those with monoclinic structure. Synchrotron-based quantification Of the octahedral rotation network reveals that the tilting pattern in both film variants is the same (albeit with slightly different magnitudes of in-plane rotation angles): The abnormal rotation pattern observed in tetragonal SrRuO3 indicates a possible decoupling between the internal octahedral rotation and lattice symmetry, which could provide new opportunities to engineer thin-film structure and properties.

引用

页码：14871 / 14878

页数：8

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