Anisotropic chemical expansion due to oxygen vacancies in perovskite films
Abstract 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 s...
Guardado en:
Autores principales: | , , , |
---|---|
Formato: | article |
Lenguaje: | EN |
Publicado: |
Nature Portfolio
2021
|
Materias: | |
Acceso en línea: | https://doaj.org/article/f5939ac55e94426e8c04f77865a8d2ef |
Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
id |
oai:doaj.org-article:f5939ac55e94426e8c04f77865a8d2ef |
---|---|
record_format |
dspace |
spelling |
oai:doaj.org-article:f5939ac55e94426e8c04f77865a8d2ef2021-12-02T16:30:10ZAnisotropic chemical expansion due to oxygen vacancies in perovskite films10.1038/s41598-021-93968-12045-2322https://doaj.org/article/f5939ac55e94426e8c04f77865a8d2ef2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93968-1https://doaj.org/toc/2045-2322Abstract 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 vacancies. Elastic interaction of the dipoles with substrate-imposed misfit strain is suggested to define the dipolar orientation. Such elastic behavior of oxygen vacancies is anticipated to be general for perovskite films and have critical impacts on the film synthesis and response functions.M. TyuninaO. PacherovaT. KocourekA. DejnekaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-6 (2021) |
institution |
DOAJ |
collection |
DOAJ |
language |
EN |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q M. Tyunina O. Pacherova T. Kocourek A. Dejneka Anisotropic chemical expansion due to oxygen vacancies in perovskite films |
description |
Abstract 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 vacancies. Elastic interaction of the dipoles with substrate-imposed misfit strain is suggested to define the dipolar orientation. Such elastic behavior of oxygen vacancies is anticipated to be general for perovskite films and have critical impacts on the film synthesis and response functions. |
format |
article |
author |
M. Tyunina O. Pacherova T. Kocourek A. Dejneka |
author_facet |
M. Tyunina O. Pacherova T. Kocourek A. Dejneka |
author_sort |
M. Tyunina |
title |
Anisotropic chemical expansion due to oxygen vacancies in perovskite films |
title_short |
Anisotropic chemical expansion due to oxygen vacancies in perovskite films |
title_full |
Anisotropic chemical expansion due to oxygen vacancies in perovskite films |
title_fullStr |
Anisotropic chemical expansion due to oxygen vacancies in perovskite films |
title_full_unstemmed |
Anisotropic chemical expansion due to oxygen vacancies in perovskite films |
title_sort |
anisotropic chemical expansion due to oxygen vacancies in perovskite films |
publisher |
Nature Portfolio |
publishDate |
2021 |
url |
https://doaj.org/article/f5939ac55e94426e8c04f77865a8d2ef |
work_keys_str_mv |
AT mtyunina anisotropicchemicalexpansionduetooxygenvacanciesinperovskitefilms AT opacherova anisotropicchemicalexpansionduetooxygenvacanciesinperovskitefilms AT tkocourek anisotropicchemicalexpansionduetooxygenvacanciesinperovskitefilms AT adejneka anisotropicchemicalexpansionduetooxygenvacanciesinperovskitefilms |
_version_ |
1718383969795309568 |