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Title: Crystal structures and electrical and optical properties of MgIn{sub 2{minus}x}Ga{sub x}O{sub 4} solid solutions

Abstract

Equilibrium phase relationships in the MgIn{sub 2}O{sub 4}-MgGa{sub 2}O{sub 4} system at 1400 C were determined by X-ray diffraction. Single phases of the inverse-spinel-type MgIn{sub 2}O{sub 4}, the layered MgInGaO{sub 4}, and the inverse-spinel-type MgGa{sub 2}O{sub 4} were observed in a compositional range of 0 {le} x {le} 0.35, 0.8 {le} x {le} 1.0, and 1.5 {le} x {le} 2.0 in MgIn{sub 2{minus}x}Ga{sub x}O{sub 4}, respectively. Rietveld structural refinement revealed that the layered MgInGaO{sub 4} (space group R{bar 3}m, a = 3.3060(4), c = 25.832(3) {angstrom}) comprised a InO{sub 2}{sup {minus}} single octahedral layer and a MgGaO{sub 2}{sup +} double trigonal-bipyramid layer alternatingly stacked along the z-axis. With increasing gallium content, room-temperature conductivity decreased, whereas transparency and optical band gap increased. Results of single-point energy calculation using the CASTEP code supported that MgIn{sub 2}O{sub 4} is a good conductor with a band gap of {approximately}3.5 eV and that MgGa{sub 2}O{sub 4} is a poor conductor with a band gap of {approximately}5 eV.

Authors:
; ; ; ; ;  [1]
  1. Univ. of Tokushima (Japan). Dept. of Chemical Science and Technology
Publication Date:
OSTI Identifier:
329133
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 142; Journal Issue: 1; Other Information: PBD: Jan 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRYSTAL STRUCTURE; ELECTRICAL PROPERTIES; OPTICAL PROPERTIES; SYNTHESIS; MAGNESIUM OXIDES; INDIUM OXIDES; GALLIUM OXIDES; X-RAY DIFFRACTION; CHEMICAL COMPOSITION; LATTICE PARAMETERS

Citation Formats

Moriga, Toshihiro, Sakamoto, Takashi, Sato, Yoshiki, Haris, A H.K., Suenari, Ryoichi, and Nakabayashi, Ichiro. Crystal structures and electrical and optical properties of MgIn{sub 2{minus}x}Ga{sub x}O{sub 4} solid solutions. United States: N. p., 1999. Web. doi:10.1006/jssc.1998.8036.
Moriga, Toshihiro, Sakamoto, Takashi, Sato, Yoshiki, Haris, A H.K., Suenari, Ryoichi, & Nakabayashi, Ichiro. Crystal structures and electrical and optical properties of MgIn{sub 2{minus}x}Ga{sub x}O{sub 4} solid solutions. United States. doi:10.1006/jssc.1998.8036.
Moriga, Toshihiro, Sakamoto, Takashi, Sato, Yoshiki, Haris, A H.K., Suenari, Ryoichi, and Nakabayashi, Ichiro. Fri . "Crystal structures and electrical and optical properties of MgIn{sub 2{minus}x}Ga{sub x}O{sub 4} solid solutions". United States. doi:10.1006/jssc.1998.8036.
@article{osti_329133,
title = {Crystal structures and electrical and optical properties of MgIn{sub 2{minus}x}Ga{sub x}O{sub 4} solid solutions},
author = {Moriga, Toshihiro and Sakamoto, Takashi and Sato, Yoshiki and Haris, A H.K. and Suenari, Ryoichi and Nakabayashi, Ichiro},
abstractNote = {Equilibrium phase relationships in the MgIn{sub 2}O{sub 4}-MgGa{sub 2}O{sub 4} system at 1400 C were determined by X-ray diffraction. Single phases of the inverse-spinel-type MgIn{sub 2}O{sub 4}, the layered MgInGaO{sub 4}, and the inverse-spinel-type MgGa{sub 2}O{sub 4} were observed in a compositional range of 0 {le} x {le} 0.35, 0.8 {le} x {le} 1.0, and 1.5 {le} x {le} 2.0 in MgIn{sub 2{minus}x}Ga{sub x}O{sub 4}, respectively. Rietveld structural refinement revealed that the layered MgInGaO{sub 4} (space group R{bar 3}m, a = 3.3060(4), c = 25.832(3) {angstrom}) comprised a InO{sub 2}{sup {minus}} single octahedral layer and a MgGaO{sub 2}{sup +} double trigonal-bipyramid layer alternatingly stacked along the z-axis. With increasing gallium content, room-temperature conductivity decreased, whereas transparency and optical band gap increased. Results of single-point energy calculation using the CASTEP code supported that MgIn{sub 2}O{sub 4} is a good conductor with a band gap of {approximately}3.5 eV and that MgGa{sub 2}O{sub 4} is a poor conductor with a band gap of {approximately}5 eV.},
doi = {10.1006/jssc.1998.8036},
journal = {Journal of Solid State Chemistry},
number = 1,
volume = 142,
place = {United States},
year = {1999},
month = {1}
}