Extraordinary fast oxide ion conductivity in La1.61GeO5-δ thin film consisting of nano-size grain

研究成果: Contribution to journalArticle査読

5 被引用数 (Scopus)

抄録

Thin films of La1.61GeO5-δ, a new oxide ionic conductor, were fabricated on dense polycrystalline Al2O3 substrates by a pulsed laser deposition (PLD) method and the effect of the film thickness on the oxide ionic conductivity was investigated on the nanoscale. The deposition parameters were optimized to obtain La1.61GeO5-δ thin films with stoichiometric composition. Annealing was found necessary to get crystalline La1.61GeO5-δ thin films. It was also found that the annealed La1.61GeO5-δ film exhibited extraordinarily high oxide ionic conductivity. Due to the nano-size effects, the oxide ion conductivity of La1.61GeO5-δ thin films increased with the decreasing thickness as compared to that in bulk La1.61GeO5-δ. In particular, the improvement in conductivity of the film at low temperature was significant .The electrical conductivity of the La1.61GeO5-δ film with a thickness of 373 nm is as high as 0.05 S cm- 1 (log(σ/S cm- 1) = - 1.3) at 573 K.

本文言語英語
ページ(範囲)1733-1736
ページ数4
ジャーナルSolid State Ionics
177
19-25 SPEC. ISS.
DOI
出版ステータス出版済み - 10 15 2006

All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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