Nanoscale mapping of oxygen vacancy kinetics in nanocrystalline Samarium doped ceria thin films

S. Doria, N. Yang, A. Kumar, S. Jesse, A. Tebano, C. Aruta, E. Di Bartolomeo, T.M. Arruda, S.V. Kalinin, S. Licoccia, G. Balestrino

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20 Citations (Scopus)

Abstract

The position-dependent oxygen vacancy dynamics induced by a biased scanning probe microscopy tip in Samarium doped ceria thin films grown on MgO (100) substrates is investigated. The granularity of the samples gives rise to spatially dependent local electrochemical activity, as explored by electrochemical strain microscopy. The kinetics of the oxygen vacancy relaxation process is investigated separately for grain boundaries and grains. Higher oxygen vacancy concentration variation and slower diffusion are observed in the grain boundary regions as compared to the grains.
Original languageEnglish
Article number171605
Pages (from-to)1-4
Number of pages4
JournalApplied Physics Letters
Volume103
DOIs
Publication statusPublished - 2013

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