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Dielectric behaviour of nitrogen doped perovskite SrTiO.sub.3-δ./sub.N.sub.δ./sub. films
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SYSNO ASEP 0580189 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Dielectric behaviour of nitrogen doped perovskite SrTiO3-δNδ films Author(s) Tyunina, Marina (FZU-D) ORCID
Rusevich, L.L. (LT)
Savinov, Maxim (FZU-D) RID, ORCID
Kotomin, E.A. (LT)
Dejneka, Alexandr (FZU-D) RID, ORCIDNumber of authors 5 Source Title Journal of Materials Chemistry C. - : Royal Society of Chemistry - ISSN 2050-7526
Roč. 11, č. 47 (2023), s. 16689-16698Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords hight-permittivity dielectrics ; ABO3 dielectrics ; lattice vibrations ; perovskite oxides Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA22-10832S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 001109338000001 EID SCOPUS 85179088862 DOI 10.1039/d3tc03757f Annotation Technologically important high-permittivity dielectrics are often achieved using cationic engineering of ABO3-type perovskite para(ferro)electrics. Here, we experimentally and theoretically explore the potential of less conventional anionic engineering in ABO3 dielectrics. We demonstrate that in an archetypal representative SrTiO3, nitrogen substitution can occur on two distinct oxygen atomic sites, reduce crystal symmetry, and lead to significant changes in the patterns and frequencies of lattice vibrations. These phonon transformations diminish permittivity, whereas contribution from nitrogeninduced nanoregions can raise it. The effects of nitrogen are found to be especially strong in epitaxial films. We anticipate that the revealed phenomena may be relevant for a broad class of high-permittivity perovskite oxides. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2024 Electronic address https://hdl.handle.net/11104/0348950
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