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Strain enhancement due to oxygen vacancies in perovskite oxide films
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SYSNO ASEP 0567894 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Strain enhancement due to oxygen vacancies in perovskite oxide films Author(s) Tyunina, Marina (FZU-D) ORCID
Levoska, J. (FI)
Pacherová, Oliva (FZU-D) RID, ORCID
Kocourek, Tomáš (FZU-D) RID, ORCID, SAI
Dejneka, Alexandr (FZU-D) RID, ORCIDNumber of authors 5 Source Title Journal of Materials Chemistry C. - : Royal Society of Chemistry - ISSN 2050-7526
Roč. 10, č. 17 (2022), s. 6770-6777Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords strain enhancemen ; oxygen vacancies ; perovskite oxide films Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GA22-10832S GA ČR - Czech Science Foundation (CSF) EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000781210600001 EID SCOPUS 85129323206 DOI 10.1039/d1tc04969k Annotation Control of lattice strain in epitaxial films of ABO3 perovskite oxides is crucial for modern understanding and applications of these scientifically and technologically important materials. Here, we show that oxygen vacancies have unique impacts on lattice strain in such films. We suggest that in the presence of substrate-imposed misfit in epitaxial or highly oriented films, the crystallographic alignment of anisotropic elastic dipole tensors of oxygen vacancies is energetically favorable. The dipolar alignment leads to an enhanced above-misfit magnitude of maximal lattice strain and to increased inhomogeneous strain or strain gradients. The vacancy-induced remarkably strong elastic effects are experimentally validated by varying the misfit strain and oxygen content in thin films of perovskite niobate (ANbO3) and titanate (ATiO3) ferroelectrics. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2023 Electronic address https://hdl.handle.net/11104/0339146
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