Anisotropic chemical expansion due to oxygen vacancies in perovskite films

0552224 - FZÚ 2022 RIV GB eng J - Journal Article
Tyunina, Marina - Pacherová, Oliva - Kocourek, Tomáš - Dejneka, Alexandr
Anisotropic chemical expansion due to oxygen vacancies in perovskite films.
Scientific Reports. Roč. 11, č. 1 (2021), č. článku 15247. ISSN 2045-2322. E-ISSN 2045-2322
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 : surfaces * interfaces and thin films * electronic properties and materials
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.997, year: 2021
Method of publishing: Open access

In scientifically intriguing and technologically important multifunctional ABO3 perovskite oxides, oxygen vacancies are most common defects. They cause lattice expansion and can alter the key functional properties. Here, it is demonstrated that contrary to weak isotropic expansion in bulk samples, oxygen vacancies produce strong anisotropic strain in epitaxial thin films. This anisotropic chemical strain is explained by preferential orientation of elastic dipoles of the vacancie.

Permanent Link: http://hdl.handle.net/11104/0327363