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

Fingerprint

Metal insulator transition
Neutron powder diffraction
Bond length
Lanthanum
Ionic conductivity
Electrochemical properties
Structural properties
Crystal structure
gallates
Atoms
Oxygen
lanthanum
electronics
ion currents
conductors
transition metals
insulators
neutrons
conductivity
electrical resistivity

Keywords

  • LaGaO
  • Mixed ionic-electronic conductor
  • Neutron diffraction

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

Structural and electrochemical properties of La0.8Sr0.2Ga1-xFexO3 . / Mori, Kazuhiro; Onodera, Yohei; Kiyanagi, Ryoji; Richardson, James W.; Itoh, Keiji; Sugiyama, Masaaki; Kamiyama, Takashi; Fukunaga, Toshiharu.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 600, No. 1, 21.02.2009, p. 328-331.

Research output: Contribution to journalArticle

Mori, Kazuhiro ; Onodera, Yohei ; Kiyanagi, Ryoji ; Richardson, James W. ; Itoh, Keiji ; Sugiyama, Masaaki ; Kamiyama, Takashi ; Fukunaga, Toshiharu. / Structural and electrochemical properties of La0.8Sr0.2Ga1-xFexO3 In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2009 ; Vol. 600, No. 1. pp. 328-331.
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AU - Richardson, James W.

AU - Itoh, Keiji

AU - Sugiyama, Masaaki

AU - Kamiyama, Takashi

AU - Fukunaga, Toshiharu

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