Zobrazeno 1 - 10
of 232
pro vyhledávání: '"Ikuya YAMADA"'
Autor:
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
Publikováno v:
Solids, Vol 5, Iss 3, Pp 422-433 (2024)
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+
Externí odkaz:
https://doaj.org/article/623ce9703b3945c886b4945eee7126fc
Publikováno v:
International Journal of Ceramic Engineering & Science, Vol 4, Iss 4, Pp 249-256 (2022)
Abstract A novel transition metal oxide CeMn3Rh4O12 has been synthesized using high‐pressure and high‐temperature conditions of 12 GPa and 1573 K. CeMn3Rh4O12 crystallizes in the AA'3B4O12‐type quadruple perovskite structure with A‐site order
Externí odkaz:
https://doaj.org/article/8c9c46cdd6d74008b5f36f24976a1abb
Publikováno v:
International Journal of Ceramic Engineering & Science, Vol 4, Iss 2, Pp 123-129 (2022)
Abstract A novel cobalt oxide LaCo6O11 has been synthesized under high pressure of 8 GPa, and its crystal structure and magnetic property have been investigated. Rietveld analysis using synchrotron X‐ray powder diffraction data demonstrates that La
Externí odkaz:
https://doaj.org/article/8c9dc47c66c7450e9b37e2689dc52b5f
Autor:
Hajime Yamamoto, Haruna Aizawa, Ikuya Yamada, Kaoru Toda, Atsushi Tanaka, Masaki Azuma, Yuki Sakai, Takumi Nishikubo, Hiroyuki Kimura
Publikováno v:
Journal of Asian Ceramic Societies, Vol 9, Iss 3, Pp 1147-1153 (2021)
Electronic states in solid-solution transition metal oxides may differ from those in their parent compounds, and this results in interesting electronic properties. In this study, the valence states and electronic properties of solid solutions of (1
Externí odkaz:
https://doaj.org/article/c496cccfd6bf4e27b8c8da8c4620a33f
Publikováno v:
Electrochemistry, Vol 89, Iss 2, Pp 94-99 (2021)
Lithium-excess transition metal (M) oxyfluorides, LixMO1+x−yFy, have received considerable attention as positive electrode materials for lithium-ion batteries. Little is known about the relationship between the crystallinity and electrochemical rea
Externí odkaz:
https://doaj.org/article/29dec29f7fe44630bee666eb298f2168
Autor:
Kazuhiko Mukai, Ikuya Yamada
Publikováno v:
ACS Omega, Vol 5, Iss 17, Pp 10115-10122 (2020)
Externí odkaz:
https://doaj.org/article/aa2844df05374bef92245a20a3998bb8
Publikováno v:
ACS Omega, Vol 4, Iss 4, Pp 6459-6467 (2019)
Externí odkaz:
https://doaj.org/article/1ed5290d0eca4df08e99ed19098753fc
Publikováno v:
Transactions of the Association for Computational Linguistics, Vol 5 (2021)
Externí odkaz:
https://doaj.org/article/5ba684b8427549cfa0a4ca0951d406e0
Publikováno v:
Science and Technology of Advanced Materials, Vol 19, Iss 1, Pp 101-107 (2018)
Estimation of structure stability is an essential issue in materials design and synthesis. Global instability index (GII) based on bond-valence method is applied as a simple indication, while density functional theory calculation is adopted for accur
Externí odkaz:
https://doaj.org/article/43e152a3a06e451fa88dafcf190a107b
Autor:
Ikuya Yamada
Publikováno v:
Science and Technology of Advanced Materials, Vol 18, Iss 1, Pp 541-548 (2017)
Quadruple perovskite oxides AA′3B4O12 demonstrate a rich variety of structural and electronic properties. A large number of constituent elements for A/A′/B-site cations can be introduced using the ultra-high-pressure synthesis method. Development
Externí odkaz:
https://doaj.org/article/cf691e2c13bc4b4f89a06fd4b0378790