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- Title
Perovskite-Derived Layered Crystal Structure in SrCo<sub>0.26</sub>Fe<sub>0.74</sub>O<sub>3-δ</sub> Thin Films.
- Authors
Cho, Eunsoo; Kumar, Abinash; Shuai Ning; LeBeau, James M.; Ross, Caroline A.
- Abstract
Oxygen coordination and vacancy ordering play an important role in dictating the functionality of complex oxides. In this work, an unconventional layering of oxygen ions in a mixed conductor SrCo1-xFexO3-δ (SCFO) thin film grown epitaxially on SrTiO3 (STO) is reported. Scanning transmission electron microscopy (STEM) reveals alternating layers of oxygen deficiency along the growth direction, with the oxygen-rich layer correlated with the neighboring Co,Fe-site intensity, and contraction of the Sr–Sr distance. Density functional theory (DFT) calculations and STEM image simulations support the emergence of periodic (Co,Fe)O6 and (Co,Fe)O4/(Co,Fe)O5 layers, an ordering that is also sensitive to the Co:Fe ratio.
- Subjects
SCANNING transmission electron microscopy; CRYSTAL structure; DENSITY functional theory; MAGNETIC films
- Publication
Advanced Materials Interfaces, 2024, Vol 11, Issue 7, p1
- ISSN
2196-7350
- Publication type
Article
- DOI
10.1002/admi.202300807