Nanosize effect on the oxide ionic conductivity of lanthanum germanite thin films

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Abstract

Conductivity of La1.61GeO5-δ thin films increased with decreasing film thickness to nanosize or several micrometers. In particular, the evaluation of the conductivity for the films with nanosize thickness at low temperatures was significant. The conductivity of the film was independent of the oxygen partial pressure from 1 to 10-21 atm and the transport number of oxygen ion in the film was near unity, suggesting that the oxygen ionic conductivity was dominant over a wide pO2 range. This effect was induced by the large anisotropy of the oxide ionic conduction and the expansion of the lattice of La1.61GeO5-δ.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume8
Issue number11
DOIs
Publication statusPublished - Nov 21 2005

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

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