Hiroki Ishibashi
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Hiroki Ishibashi has a total of 15 co-authors. Here are the top co-authors by number of shared publications:
- Fernando Cubillas
Departamento de Investigaciones en Polimeros y Materiales, Universidad de Sonora, Hermosillo 83000, Mexico
1 shared publication - Francisco Browna
Department of Polymers, University of Sonora, Blvd. Luis Donaldo Colosio, S/N, Hermosillo 83000, Mexico
1 shared publication - Hayato Togano
Department of Materials Science, Graduate School of Engineering, Osaka Metropolitan University, Sakai 599-8531, Japan
1 shared publication - Hena Das
Kanagawa Institute of Industrial Science and Technology, Ebina, Japan
1 shared publication - Ikuya Yamada
Department of Materials Science, Graduate School of Engineering, Osaka Metropolitan University, Sakai 599-8531, Japan
1 shared publication - Kei Shigematsu
Materials and Structures Laboratory, Institute of Integrated Research, Institute of Science Tokyo, 4259 Nagatsuta, Midori-ku, Yokohama, Kanagawa 226-8501, Japan
1 shared publication
Latest Publications
- Open Access
Pressure-Induced YbFe2O4-Type to Spinel Structural Change of InGaMgO4
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.
Open AccessPressure-Induced YbFe2O4-Type to Spinel Structural Change of InGaMgO4
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.