Photoelectron holography characterization of protonated brownmillerite SrCoO<sub>2.5</sub> epitaxial films
We characterized protonated SrCoO 2.5 epitaxial films by the photoelectron holography technique.We found that photoelectron holography patterns change due to cation displacements induced by electrochemical protonation.By simulating holography patterns based on structural models of the protonated SrCoO 2.5 using machine-learning enhanced global optimization and comparing them with the experimentally observed patterns, we evaluated hydrogen concentration and cation displacements in protonated SrCoO 2.5 films.Our results show that photoelectron holography is useful in characterizing protonation-induced changes in metal transition oxides.
Authors
- Thanh Ngoc Pham (ORCID: https://orcid.org/0000-0001-5141-8720)
- Yuichi Shimakawa (ORCID: https://orcid.org/0000-0003-1019-2512)
- Daisuke Kan (ORCID: https://orcid.org/0000-0002-7505-0059)
- T. Matsushita (ORCID: https://orcid.org/0000-0002-2547-3811)
- Yoshitada Morikawa (ORCID: https://orcid.org/0000-0003-4895-4121)
- Lingling Xie (ORCID: https://orcid.org/0000-0002-4096-1848)
- Yosuke Isoda (ORCID: https://orcid.org/0000-0003-4445-9908)
- Y Hashimoto (ORCID: https://orcid.org/0000-0003-4527-5932)
Institutions
- Vietnam National University Ho Chi Minh City (VN)
- Kyoto University (JP)
- Committee on Climate Change (GB)
- Open Evidence (ES)
- Precision for Medicine (United States) (US)
- Precision Research (United States) (US)
- Instituto de Investigaciones Químicas (ES)
- Kyoto University Institute for Chemical Research
- An Giang University (VN)
- Nara Institute of Science and Technology (JP)
- The University of Osaka (JP)
Publication Details
- Journal
- Journal of the Ceramic Society of Japan
- Published
- 2025-05-27
- DOI
- https://doi.org/10.2109/jcersj2.25062
- Primary Topic
- X-ray Diffraction in Crystallography
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Ministry of Education, Culture, Sports, Science and Technology
- Viet Nam National University Ho Chi Minh City
- Japan Society for the Promotion of Science
- Japan Science and Technology Agency
- Institute for Materials Research, Tohoku University
- Division of Materials Research