University of Oulu

Tyunina, M., Peräntie, J., Kocourek, T., Saukko, S., Jantunen, H., Jelinek, M., & Dejneka, A. (2020). Oxygen vacancy dipoles in strained epitaxial BaTiO3 films. Physical Review Research, 2(2).

Oxygen vacancy dipoles in strained epitaxial BaTiO3 films

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Author: Tyunina, M.1,2,3; Peräntie, J.1; Kocourek, T.2;
Organizations: 1Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, P. O. Box 4500, FI-90014 Oulu, Finland
2Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 18221 Prague, Czech Republic
3Center of Microscopy and Nanotechnology, University of Oulu, P. O. Box 8000, FI-90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.9 MB)
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Language: English
Published: American Physical Society, 2020
Publish Date: 2020-06-03


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.

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Series: Physical review research
ISSN: 2643-1564
ISSN-E: 2643-1564
ISSN-L: 2643-1564
Volume: 2
Issue: 2
Article number: 023056
DOI: 10.1103/PhysRevResearch.2.023056
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
216 Materials engineering
221 Nanotechnology
Funding: The authors acknowledge support from the European Structural and Investment Funds and the Ministry of Education, Youth, and Sports of the Czech Republic through Program “Research, Development, and Education” (Project No. SOLID21-CZ.02.1.01/0.0/0.0/16_019/0000760); the Czech Science Foundation (Grant No. 19-09671S); the Academy of Finland (Grant No. 298409); and the European Research Council (Advanced Grant No. 291132). The authors are grateful to M. Klinger, E. Heinonen, M. Savinov, and D. Chvostova for their assistance.
EU Grant Number: (291132) ULTIMATE CERAMICS - Printed Electroceramics with Ultimate Compositions
Academy of Finland Grant Number: 298409
Detailed Information: 298409 (Academy of Finland Funding decision)
Copyright information: © The Authors 2020. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.