Materials development on low dimensional rhenium oxides with novel physical properties
| Project/Area Number |
15K05187
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Toyota Physical and Chemical Research Institute |
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Principal Investigator |
Ueda Yutaka 公益財団法人豊田理化学研究所, フェロー事業部門, フェロー (20127054)
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| Co-Investigator(Renkei-kenkyūsha) |
YAMAUCHI Touru 東京大学, 物性研究所, 技術専門職員 (10422445)
ITOH Masayuki 名古屋大学, 大学院理学研究科, 教授 (90176363)
KAGEYAMA Hiroshi 京都大学, 大学院工学研究科, 教授 (40302640)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 物質開発 / 強相関電子系 / レニウム酸化物 / 相転移 / 酸水素化物 / 二次元電子系 |
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| Outline of Final Research Achievements |
Two materials were newly developed. The first material is a rhenium oxide. Sr7Re4O19 was successfully synthesized and a phase transition was found at 208 K. The magnetic susceptibility rapidly decreases below 208 K, suggesting a spin-singlet ground state. The phase transition is also accompanied by gradual changes of both the structure and resistivity. The obtained results suggest a Peierls transition or charge density wave transition. The second material is a perovskite related oxyhydride with ordered hydride anions. The introduction of hydrogen to CaVO3-δ with ordered oxygen vacancies has been tried. CaVO3-δ which was shielded into silica tube together with hydrogen gas and heated at 873 K for 3 days gave the same X-ray diffraction pattern as that of the starting CaVO3-δ. A weak signal has been observed in 1H-NMR measurements, indicating the existence of hydride anions (H-). It is a possible first oxyhydride with hydride anions ordered in a chainlike form.
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Report
(4 results)
Research Products
(20 results)
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[Presentation] K2Cr8O16の高圧μSR2017
Author(s)
杉山 純, 野崎 洋, 梅垣いづみ, 礒部正彦, 高木英典, 上田 寛, Martin Mansson, Ola K. Forslund, Yasmine Sassa, Daniel Andreica, Zurab Guguchia
Organizer
日本物理学会第72回年次大会
Place of Presentation
大阪大学豊中キャンパス
Year and Date
2017-03-17
Related Report
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