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


Autoria(s): Farrow, Tim; Yang, Nan; Doria, Sandra; Belianinov, Alex; Jesse, Stephen; Arruda, Thomas M.; Balestrino, Giuseppe; Kalinin, Sergei V.; Kumar, Amit
Data(s)

2015

Resumo

Spatial variability of conductivity in ceria is explored using scanning probe microscopy (SPM) 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 suggests 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 (MIEC) systems including memristors and electroresistors, as well as physical systems such as ferroelectric tunneling barriers.

Formato

application/pdf

Identificador

http://pure.qub.ac.uk/portal/en/publications/subna-spatially-resolved-conductivity-profiling-of-surface-and-interface-defects-in-ceria-films(6f795f06-0b5d-4e11-ab5d-ef3a5f0c857d).html

http://dx.doi.org/10.1063/1.4914943

http://pure.qub.ac.uk/ws/files/15599640/1.4914943.pdf

Idioma(s)

eng

Direitos

info:eu-repo/semantics/openAccess

Fonte

Farrow , T , Yang , N , Doria , S , Belianinov , A , Jesse , S , Arruda , T M , Balestrino , G , Kalinin , S V & Kumar , A 2015 , ' Sub-nA spatially resolved conductivity profiling of surface and interface defects in ceria films ' APL Materials , vol 3 , no. 3 . DOI: 10.1063/1.4914943

Palavras-Chave #Cerium Oxide #ATOMIC FORCE MICROSCOPY
Tipo

article