Perovskite‐Derived Layered Crystal Structure in SrCo0.26Fe0.74O3‐δ Thin Films

Perovskite‐Derived Layered Crystal Structure in SrCo0.26Fe0.74O3‐δ Thin Films

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...

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Bibliographic Details
Main Authors: Eunsoo Cho, Abinash Kumar, Shuai Ning, James M. LeBeau, Caroline A. Ross
Format: Article
Language:English
Published: Wiley-VCH 2024-03-01
Series:Advanced Materials Interfaces
Subjects:
complex oxide
defect engineering
magnetic thin films
perovskite
vacancy ordering
Online Access:https://doi.org/10.1002/admi.202300807
Description
Summary: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.
ISSN:2196-7350

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