Open AccessResearch Update: Interface-engineered oxygen octahedral tilts in perovskite oxide heterostructures
Author(s) -
Daisuke Kan,
Ryotaro Aso,
Hiroki Kurata,
Yuichi Shimakawa
Publication year - 2015
Publication title -
apl materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.571
H-Index - 60
ISSN - 2166-532X
DOI - 10.1063/1.4918965
Subject(s) - materials science , perovskite (structure) , stacking , heterojunction , octahedron , superlattice , substrate (aquarium) , oxide , layer (electronics) , condensed matter physics , transmission electron microscopy , anisotropy , strain engineering , scanning transmission electron microscopy , crystallography , nanotechnology , optoelectronics , nuclear magnetic resonance , crystal structure , optics , chemistry , metallurgy , silicon , physics , oceanography , geology
Interface engineering of structural distortions is a key for exploring the functional properties of oxide heterostructures and superlattices. In this paper, we report on our comprehensive investigations of oxygen octahedral distortions at the heterointerface between perovskite oxides SrRuO3 and BaTiO3 on GdScO3 substrates and of the influences of the interfacially engineered distortions on the magneto-transport properties of the SrRuO3 layer. Our state-of-the-art annular bright-field imaging in aberration-corrected scanning transmission electron microscopy revealed that the RuO6 octahedral distortions in the SrRuO3 layer have strong dependence on the stacking order of the SrRuO3 and BaTiO3 layers on the substrate. This can be attributed to the difference in the interfacial octahedral connections. We also found that the stacking order of the oxide layers has a strong impact on the magneto-transport properties, allowing for control of the magnetic anisotropy of the SrRuO3 layer through interface engineering. Our results demonstrate the significance of the interface engineering of the octahedral distortions on the structural and physical properties of perovskite oxides