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Title: Sub-nA spatially resolved conductivity profiling of surface and interface defects in ceria films

Journal Article · · APL Materials
DOI:https://doi.org/10.1063/1.4914943· OSTI ID:1265759
 [1];  [2];  [3];  [3];  [3];  [3];  [3];  [3];  [3]
  1. Queen's Univ., Belfast, Northern Ireland (United Kingdom)
  2. Univ. of Rome Tor Vergata (Italy)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Spatial variability of conductivity in ceria is explored using scanning probe microscopy with galvanostatic control. Ionically blocking electrodes are used to probe the conductivity under opposite polarities to reveal possible differences in the defect structure across a thin film of CeO2. Data suggest the existence of a large spatial inhomogeneity that could give rise to constant phase elements during standard electrochemical characterization, potentially affecting the overall conductivity of films on the macroscale. The approach discussed here can also be utilized for other mixed ionic electronic conductor systems including memristors and electroresistors, as well as physical systems such as ferroelectric tunneling barriers

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1265759
Journal Information:
APL Materials, Vol. 3; ISSN 2166-532X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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Cited By (1)

Room Temperature Polarization Phenomena in Nanocrystalline and Epitaxial Thin Films of Gd-Doped Ceria Studied by Kelvin Probe Force Microscopy journal January 2018

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