Journal article
The Dynamics of Oxygen Ion Exchange in Epitaxial Strontium Cobaltite Bilayers
Advanced materials interfaces, v 10(21), 2300127
01 Jul 2023
Abstract
The exchange of ions across interfaces is key to the field of iontronics, where the properties of the device can be altered by the local ion concentration. This study investigates a complex oxide system where structural and electronic phase transitions can be driven by changes in the concentration of oxygen ions. In situ coherent X‐ray studies are conducted on epitaxial bilayers of insulating SrCoO2.5 and metallic SrCoO3 − δ. The diffusion of oxygen ions across the bilayer is studied with X‐ray photon correlation spectroscopy to capture the dynamical behavior of the interface in reducing and oxidizing environments. The behavior is strongly asymmetric, with much slower dynamics appearing in reducing versus oxidizing environments. According to the correlation functions determined from different points in reciprocal space, this study finds that the dynamics near the center of the SrCoO2.5 crystal are generally similar to those near the heterointerfaces. The results suggest that the interface is stable and reversible, making SrCoOx a model system for the study of iontronic behavior.
The exchange of ions across interfaces is key to the field of iontronics, where the properties of the device can be altered by the local ion concentration. Results from in situ coherent X‐ray studies on epitaxial bilayers of SrCoO2.5/SrCoO3 indicate that the heterointerface is stable and reversible, making SrCoOx a model iontronic system.
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Details
- Title
- The Dynamics of Oxygen Ion Exchange in Epitaxial Strontium Cobaltite Bilayers
- Creators
- Jill K. Wenderott - Argonne National LaboratoryEric M. Dufresne - Argonne National LaboratoryYan Li - Argonne National LaboratoryHui Cao - Argonne National LaboratoryQingteng Zhang - Argonne National LaboratoryK. V. L. V. Narayanachari - Northwestern UniversityD. Bruce Buchholz - Northwestern UniversitySupratik Guha - Argonne National LaboratoryDillon D. Fong (Corresponding Author) - Argonne National Laboratory
- Publication Details
- Advanced materials interfaces, v 10(21), 2300127
- Publisher
- Wiley
- Number of pages
- 8
- Grant note
- Office of Science (DE-AC0206CH11357)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001013759700001
- Scopus ID
- 2-s2.0-85162966231
- Other Identifier
- 991022132152404721