Solids
(Aug 2024)
Pressure-Induced YbFe<sub>2</sub>O<sub>4</sub>-Type to Spinel Structural Change of InGaMgO<sub>4</sub>
Takehiro Koike,
Hena Das,
Kengo Oka,
Yoshihiro Kusano,
Fernando Cubillas,
Francisco Brown Bojorqez,
Victor Emmanuel Alvarez-Montano,
Shigekazu Ito,
Kei Shigematsu,
Hayato Togano,
Ikuya Yamada,
Hiroki Ishibashi,
Yoshiki Kubota,
Shigeo Mori,
Noboru Kimizuka,
Masaki Azuma
Affiliations
Takehiro Koike
Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8501, Japan
Hena Das
Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8501, Japan
Kengo Oka
Department of Applied Chemistry, Faculty of Science and Engineering, Kindai University, Higashiosaka 577-8502, Japan
Yoshihiro Kusano
Department of Applied Chemistry, Okayama University of Science, Okayama 700-0005, Japan
Fernando Cubillas
Departamento de Investigaciones en Polimeros y Materiales, Universidad de Sonora, Hermosillo 83000, Mexico
Francisco Brown Bojorqez
Departamento de Investigaciones en Polimeros y Materiales, Universidad de Sonora, Hermosillo 83000, Mexico
Victor Emmanuel Alvarez-Montano
Departamento de Investigaciones en Polimeros y Materiales, Universidad de Sonora, Hermosillo 83000, Mexico
Shigekazu Ito
School of Materials and Chemical Technology, Tokyo Institute of Technology, Meguro 152-8552, Japan
Kei Shigematsu
Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8501, Japan
Hayato Togano
Department of Materials Science, Graduate School of Engineering, Osaka Metropolitan University, Sakai 599-8531, Japan
Ikuya Yamada
Department of Materials Science, Graduate School of Engineering, Osaka Metropolitan University, Sakai 599-8531, Japan
Hiroki Ishibashi
Department of Physics, Graduate School of Science, Osaka Metropolitan University, Sakai 599-8531, Japan
Yoshiki Kubota
Department of Physics, Graduate School of Science, Osaka Metropolitan University, Sakai 599-8531, Japan
Shigeo Mori
Department of Materials Science, Graduate School of Engineering, Osaka Metropolitan University, Sakai 599-8531, Japan
Noboru Kimizuka
Departamento de Investigaciones en Polimeros y Materiales, Universidad de Sonora, Hermosillo 83000, Mexico
Masaki Azuma
Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8501, Japan
DOI
https://doi.org/10.3390/solids5030028
Journal volume & issue
Vol. 5,
no. 3
Abstract
Read online
Spinel-type InGaMgO4 with a = 8.56615(3) Å was prepared by treating layered YbFe2O4-type InGaMgO4 at 6 GPa and 1473 K. DFT calculation and Rietveld analysis of synchrotron X-ray powder diffraction data revealed the inverse spinel structure with In3+:Ga3+/Mg2+ = 0.726:0.274 in the tetrahedral site and 0.137:0.863 in the octahedral site. InGaMgO4 spinel is an insulator with an experimental band gap of 2.80 eV, and the attempt at hole doping by post-annealing in a reducing atmosphere to introduce an oxygen defect was unsuccessful. This is the first report of the bulk synthesis of AB2O4 compounds with both YbFe2O4 and spinel polymorphs.
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