Structural and electrochemical properties of La0.8Sr0.2Ga1-xFexO3

Kazuhiro Mori, Yohei Onodera, Ryoji Kiyanagi, James W. Richardson, Keiji Itoh, Masaaki Sugiyama, Takashi Kamiyama, Toshiharu Fukunaga

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Mixed ionic-electronic conductor of Fe doped lanthanum gallate, La0.8Sr0.2Ga1-xFexO3, has been studied by the dc four-probe method and the neutron powder diffraction. In the electrical conductivity measurement at RT, insulator-metal transition-like phenomenon was observed at around x∼0.35; this suggests an existence of the percolation limit for the electronic conductivity. Simultaneously, a bond length between O atoms, lO-O, in a MO6 octahedron (M{double bond, long}Ga1-xFex) drastically expands over x∼0.4, according to the result of crystal structure refinement based on the hexagonal phase. Such a drastic expansion in the lO-O would induce the decrease in the oxygen ionic conductivity.

Original languageEnglish
Pages (from-to)328-331
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume600
Issue number1
DOIs
Publication statusPublished - Feb 21 2009
Externally publishedYes

Keywords

  • LaGaO
  • Mixed ionic-electronic conductor
  • Neutron diffraction

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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