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Title: The Dynamics of Oxygen Ion Exchange in Epitaxial Strontium Cobaltite Bilayers

Journal Article · · Advanced Materials Interfaces
ORCiD logo [1];  [2];  [1];  [1];  [2];  [3];  [3];  [4]; ORCiD logo [1]
  1. Materials Science Division Physical Sciences and Engineering Argonne National Laboratory Lemont IL 60439 USA
  2. X‐ray Science Division Advanced Photon Source Argonne National Laboratory Lemont IL 60439 USA
  3. Materials Science and Engineering Northwestern University Evanston IL 60201 USA
  4. Materials Science Division Physical Sciences and Engineering Argonne National Laboratory Lemont IL 60439 USA, Pritzker School of Molecular Engineering University of Chicago Chicago IL 60637 USA

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 SrCoO 2.5 and metallic SrCoO 3 − 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 SrCoO 2.5 crystal are generally similar to those near the heterointerfaces. The results suggest that the interface is stable and reversible, making SrCoO x a model system for the study of iontronic behavior.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1986392
Journal Information:
Advanced Materials Interfaces, Journal Name: Advanced Materials Interfaces Journal Issue: 21 Vol. 10; ISSN 2196-7350
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (33)

Noble‐Metal‐Assisted Fast Interfacial Oxygen Migration with Topotactic Phase Transition in Perovskite Oxides journal September 2021
Topotactic Phase Transformation of the Brownmillerite SrCoO 2.5 to the Perovskite SrCoO 3- δ journal July 2013
Endeavor of Iontronics: From Fundamentals to Applications of Ion‐Controlled Electronics journal June 2017
Complex Oxides for Brain‐Inspired Computing: A Review journal November 2022
Compute in‐Memory with Non‐Volatile Elements for Neural Networks: A Review from a Co‐Design Perspective journal March 2023
Transition Metal Oxide Anodes for Electrochemical Energy Storage in Lithium‐ and Sodium‐Ion Batteries journal November 2019
Preparation and characterization of Fully stoichiometric SrCoO3 by electrochemical oxidation journal January 1993
Advances in transition metal oxide catalysts for carbon monoxide oxidation: a review journal December 2019
Dynamics in hard condensed matter probed by X-ray photon correlation spectroscopy: Present and beyond journal October 2018
Transition metal oxides for sodium-ion batteries journal October 2016
Transition metal oxide-based electrode materials for flexible supercapacitors: A review journal March 2021
Phase diagram of the Sr–Co–O system journal March 2015
Reversible phase switching between antiferromagnetic SrCoO2.5 and ferromagnetic SrCoO3−δ by a flexible solid-state electrolyte gate journal February 2020
Atomic-scale operando observation of oxygen diffusion during topotactic phase transition of a perovskite oxide journal September 2022
Correlation between reconstructive phase transitions and transport properties from SrCoO2.5 brownmillerite: A neutron diffraction study journal December 2008
Strain-Enhanced Oxygen Dynamics and Redox Reversibility in Topotactic SrCoO 3-δ (0 < δ ≤ 0.5) journal January 2017
Voltage-Controlled Topotactic Phase Transition in Thin-Film SrCoO x Monitored by In Situ X-ray Diffraction journal January 2016
Layer-by-Layer Epitaxial Growth of Defect-Engineered Strontium Cobaltites journal January 2018
Control of Oxygen Vacancy Ordering in Brownmillerite Thin Films via Ionic Liquid Gating journal April 2022
Electric-field control of tri-state phase transformation with a selective dual-ion switch journal May 2017
Reversible redox reactions in an epitaxially stabilized SrCoOx oxygen sponge journal August 2013
Direct imaging of structural changes induced by ionic liquid gating leading to engineered three-dimensional meso-structures journal August 2018
Electrolyte-based ionic control of functional oxides journal December 2018
Transition-metal-oxide-based catalysts for the oxygen reduction reaction journal January 2018
Structural evolution of epitaxial SrCoO x films near topotactic phase transition journal December 2015
Preface for Special Topic: Ionotronics journal April 2017
In operando studies of CO oxidation on epitaxial SrCoO2.5+δ thin films journal August 2019
Crystallographic and magnetic structure of SrCoO 2.5 brownmillerite: Neutron study coupled with band-structure calculations journal August 2008
Cation and anion topotactic transformations in cobaltite thin films leading to Ruddlesden-Popper phases journal June 2021
Co-refinement of multiple-contrast neutron/X-ray reflectivity data using MOTOFIT journal March 2006
Focusing a round coherent beam by spatial filtering the horizontal source journal October 2020
Analog memristive synapse based on topotactic phase transition for high-performance neuromorphic computing and neural network pruning journal July 2021
Hard X-Ray Photon Correlation Spectroscopy Methods for Materials Studies journal July 2018