2012 Fiscal Year Final Research Report
Synthesis of Novel Materials Based on Square Planar Iron and Exploringof Room Temperature Functionality
Project/Area Number |
22245009
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Research Category |
Grant-in-Aid for Scientific Research (A)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Inorganic chemistry
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Research Institution | Kyoto University |
Principal Investigator |
KAGEYMA Hiroshi 京都大学, 大学院・工学研究科, 教授 (40302640)
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Co-Investigator(Kenkyū-buntansha) |
TAKANO Mikio 京都大学, 物質-細胞統合システム拠点, 教授 (70068138)
KAWAKAMI Takateru 日本大学, 理工学部, 講師 (20366561)
HAYASHI Naoaki 京都大学, 学際融合教育研究推進センター, 特定業務専門職員 (70346047)
OKADA Taku 東京大学, 物性研究所, 助教 (90343938)
|
Project Period (FY) |
2010 – 2012
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Keywords | スピン転移 / 平面四配位鉄 / 高圧 X 線回折 / 高圧メスバウアー |
Research Abstract |
We have obtained novel square planar iron oxides by Mn, Co, Lanthanoides substitution of SrFeO2. We have revealed origin of the pressure-induced spin transition (S = 2 to 1) in square planar iron oxides, and observed further pressure-induced spin transition (S = 1 to 0) in SrFeO2. Moreover, we have revealed that Eu substitution of SrFeO2 significantly decreases the spin transition pressure. We synthesized a new cubic Fe 4+ perovskite BaFeO3, and revealed that BaFeO3 is the first reported Fe oxide that shows ferromagnetism at ambient pressure
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[Journal Article] (Sr1- xBax)FeO2 (0.4 ≤ x ≤ 1): a New Oxygen Deficient Perovskite Structure2012
Author(s)
Takafumi Yamamoto, Yoji Kobayashi, Naoaki Hayashi, Cédric Tassel, Takashi Saito, Shoji Yamanaka, Mikio Takano, Kenji Ohoyama, Yuichi Shimakawa, Kazuyoshi Yoshimura, and Hiroshi Kageyama
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Journal Title
J. Am. Chem. Soc.
Volume: 134 (28)
Pages: 11444- 11454
DOI
Peer Reviewed
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[Journal Article] BaFeO3, a Ferromagnetic Iron Oxide, Angewandte Chemie2011
Author(s)
Naoaki Hayashi,* Takafumi Yamamoto, Hiroshi Kageyama, Masakazu Nishi, Yoshitaka Watanabe, Takateru Kawakami, Yoshitaka Matsushita, Atsushi Fujimori, and Mikio Takano
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Journal Title
International Edition
Volume: 123巻
Pages: 12755-12758
DOI
Peer Reviewed
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[Journal Article] Pressure-induced structural, magnetic, and transport transitions in the two-legged ladder Sr3Fe2O52011
Author(s)
T. Yamamoto, C. Tassel, Y. Kobayashi, T. Kawakami, T. Okada, T. Yagi, H. Yoshida, T. Kamatani, Y. Watanabe, T. Kikegawa, M. Takano, K. Yoshimura and H. Kageyama
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Journal Title
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume: 133巻
Pages: 6036-6043
DOI
Peer Reviewed
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[Journal Article] B1-to-B2 Structural Transitions in Rock Salt Intergrowth Structures2011
Author(s)
T. Yamamoto, Y. Kobayashi, T. Okada, T. Yagi, T. Kawakami, C. Tassel, S. Kawasaki, N. Abe, K. Niwa, T. Kikegawa, N. Hirao, M. Takano, and H. Kageyama
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Journal Title
Inorg. Chem.
Volume: 50巻
Pages: 11787-11794
DOI
Peer Reviewed
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[Journal Article] Fe-Site Substitution Effect on the Structural and Magnetic Properties in SrFeO22011
Author(s)
Liis Seinberg, Takafumi Yamamoto, Cedric Tassel, Yoji Kobayashi, Naoaki Hayashi, Atsushi Kitada, Yuji Sumida, Takashi Watanabe, Masakazu Nishi, Kenji Ohoyama, Kazuyoshi Yoshimura, Mikio Takano, Werner Paulus, and Hiroshi Kageyama
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Journal Title
Inorg. Chem
Volume: 50巻
Pages: 3998-3995
DOI
Peer Reviewed
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