Back to Search
Start Over
Oxygen octahedral distortions in compressively strained SrRuO3 epitaxial thin films.
- Source :
- Journal of Applied Physics; 2018, Vol. 123 Issue 23, pN.PAG-N.PAG, 5p, 2 Diagrams, 1 Chart, 3 Graphs
- Publication Year :
- 2018
-
Abstract
- We carried out the synchrotron X-ray diffraction measurements and investigated the oxygen octahedral distortions in compressively strained SrRuO<subscript>3</subscript> epitaxial thin films on NdGaO<subscript>3</subscript> substrates. We observed half-order Bragg reflections originating from the RuO<subscript>6</subscript> octahedral distortions accommodated in the compressively strained films. Our structural analysis shows that the RuO<subscript>6</subscript> octahedra are elongated along the out-of-plane direction and are rotated in the out-of-phase manner only about the out-of-plane direction. The RuO<subscript>6</subscript> rotation angle γ<subscript>rot</subscript> is 10.9° ± 1.2°, which is larger than that in the bulk SrRuO<subscript>3</subscript>. The results indicate that the substrate-induced compressive strain enhances the out-of-plane rotations while strongly suppressing the in-plane rotations. In fact, the half-order Bragg reflections arising from the octahedral rotations about the in-plane direction are found to be weak and broad, implying that the in-plane rotations exist only in the interface region, not in the entire film. This indicates that while the in-plane octahedral rotation propagates through the interfacial octahedral connections into the film, its propagation decays within the interface region because of the compressive strain. Our results indicate that both the substrate-induced strain and the interfacial octahedral connection play important roles in determining the octahedral distortions accommodated in the strained SrRuO<subscript>3</subscript> films. [ABSTRACT FROM AUTHOR]
- Subjects :
- X-ray diffraction
SYNCHROTRONS
OCTAHEDRA
BRAGG'S law (Physics)
ELECTRIC distortion
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 123
- Issue :
- 23
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 130304119
- Full Text :
- https://doi.org/10.1063/1.5036748