T
Tsutomu Okuda
Researcher at Hiroshima University
Publications - 174
Citations - 1784
Tsutomu Okuda is an academic researcher from Hiroshima University. The author has contributed to research in topics: Nuclear quadrupole resonance & Ion. The author has an hindex of 21, co-authored 174 publications receiving 1644 citations. Previous affiliations of Tsutomu Okuda include University of Tokushima.
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Structural phase transitions of the polymorphs of CsSnI3 by means of rietveld analysis of the X-ray diffraction.
TL;DR: The successive phase transitions of the polymorphs of CsSnI3 were studied by means of the powder X-ray diffraction and their crystal structures were analyzed at three different temperatures by the...
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Phase Transition and Electric Conductivity of ASnCl3 (A = Cs and CH3NH3).
TL;DR: In this paper, a first-order phase transition of CsSnCl3 to a cubic perovskite phase was observed at Ttr = 379 K. The temperature dependence of the electric conductivity and the X-ray diffraction data for CsCl3 suggested a reconstructive nature of the phase transition, and also suggested the onset of chloride-ion diffusion just below the phase-transition temperature to the cubic phase.
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NQR and X-ray Studies of [N(CH3)4]3M2X9 and (CH3NH3)3M2X9 (M = Sb,Bi; X = Cl,Br)
Hideta Ishihara,Koichi Watanabe,Ayako Iwata,Koji Yamada,Yoshihiro Kinoshita,Tsutomu Okuda,V. G. Krishnan,Shi-qi Dou,Alarich Weiss +8 more
TL;DR: In this paper, the phase transitions of the methylammonium cations are related to the motion of the crystal symmetries of the low-temperature phases of (CH3NH3)3Bi2Br9 and [N(CH3)4]3Sb2Cl9.
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Reconstructive Phase Transformation and Kinetics of Cs3Sb2I9by Means of Rietveld Analysis of X-Ray Diffraction and127I NQR
TL;DR: In this article, the reconstructive phase transformation between two polymorphs of Cs3Sb2I9 has been studied kinetically by means of powder X-ray diffraction and127INQR spectroscopy.
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Chloride ion conductor CH3NH3GeCl3 studied by Rietveld analysis of X-ray diffraction and 35Cl NMR
TL;DR: In this article, a disordered perovskite structure at the Cl site was found by the Rietveld analysis, and this disordered model was also confirmed by 35Cl NMR. The mechanism of the ionic conductivity and the process to attain a conducting phase were discussed on the basis of the temperature dependence of the powder X-ray diffraction and the spin-lattice relaxation times.