Oxygen vacancy dipoles in strained epitaxial BaTiO.sub.3./sub. films

0533075 - FZÚ 2021 RIV US eng J - Journal Article
Tyunina, Marina - Peräntie, J. - Kocourek, Tomáš - Saukko, S. - Jantunen, H. - Jelínek, Martin - Dejneka, Alexandr
Oxygen vacancy dipoles in strained epitaxial BaTiO₃ films.
Physical Review Research. Roč. 2, č. 2 (2020), s. 1-8, č. článku 023056. E-ISSN 2643-1564
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GA19-09671S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : oxygen vacancy * dipoles * perovskite epitaxial films * ferroelectric barium titanate
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Method of publishing: Open access

The existence of out-of-plane-oriented oxygen vacancy dipoles was experimentally established in (001) perovskite epitaxial films of ferroelectric barium titanate by analyses of the crystal and electronic structure as well as the ferroelectric and optical properties. The formation of the defects was shown to occur in the presence of in-plane compressive strain and oxygen-deficient deposition conditions. The in-plane compressive strain was suggested to favor the formation of oxygen vacancies Vo in the Ba-O planes and thus stabilize the out-of-plane orientation of the dipolar (V..+2o−Ti3+)+ defects.
Permanent Link: http://hdl.handle.net/11104/0311566