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

doi:10.1016/j.nima.2008.11.084

Structural and electrochemical properties of La_0.8Sr_0.2Ga_1-xFe_xO₃

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

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Mixed ionic-electronic conductor of Fe doped lanthanum gallate, La_0.8Sr_0.2Ga_1-xFe_xO₃, 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, l_O-O, in a MO₆ octahedron (M{double bond, long}Ga_1-xFe_x) 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 l_O-O would induce the decrease in the oxygen ionic conductivity.

Original language	English
Pages (from-to)	328-331
Number of pages	4
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	600
Issue number	1
DOIs	https://doi.org/10.1016/j.nima.2008.11.084
Publication status	Published - Feb 21 2009
Externally published	Yes

Keywords

LaGaO
Mixed ionic-electronic conductor
Neutron diffraction

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1016/j.nima.2008.11.084

Cite this

Mori, K., Onodera, Y., Kiyanagi, R., Richardson, J. W., Itoh, K., Sugiyama, M., Kamiyama, T., & Fukunaga, T. (2009). Structural and electrochemical properties of La_0.8Sr_0.2Ga_1-xFe_xO₃. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 600(1), 328-331. https://doi.org/10.1016/j.nima.2008.11.084

Mori, K, Onodera, Y, Kiyanagi, R, Richardson, JW, Itoh, K, Sugiyama, M, Kamiyama, T & Fukunaga, T 2009, 'Structural and electrochemical properties of La_0.8Sr_0.2Ga_1-xFe_xO₃', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 600, no. 1, pp. 328-331. https://doi.org/10.1016/j.nima.2008.11.084

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title = "Structural and electrochemical properties of La0.8Sr0.2Ga1-xFexO3",

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.",

keywords = "LaGaO, Mixed ionic-electronic conductor, Neutron diffraction",

author = "Kazuhiro Mori and Yohei Onodera and Ryoji Kiyanagi and Richardson, {James W.} and Keiji Itoh and Masaaki Sugiyama and Takashi Kamiyama and Toshiharu Fukunaga",

note = "Funding Information: We wish to acknowledge Even Maxey of ANL for the help in the neutron scattering experiments. This work was mainly supported by the Kansai Research Foundation for Technology Promotion. The neutron scattering experiments at the ANL-IPNS were partially supported by the Inter-University Research Program on Pulsed-neutron Scattering at Oversea Facilities from the Ministry of Education, Culture, Sports, Science and Technology of Japan. ",

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AU - Mori, Kazuhiro

AU - Onodera, Yohei

AU - Kiyanagi, Ryoji

AU - Richardson, James W.

AU - Itoh, Keiji

AU - Sugiyama, Masaaki

AU - Kamiyama, Takashi

AU - Fukunaga, Toshiharu

N1 - Funding Information: We wish to acknowledge Even Maxey of ANL for the help in the neutron scattering experiments. This work was mainly supported by the Kansai Research Foundation for Technology Promotion. The neutron scattering experiments at the ANL-IPNS were partially supported by the Inter-University Research Program on Pulsed-neutron Scattering at Oversea Facilities from the Ministry of Education, Culture, Sports, Science and Technology of Japan.

PY - 2009/2/21

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N2 - 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.

AB - 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.

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