Exploration of giant piezoelectric materials using high-pressure synthesis and understanding of their mechanisms using thermal measurements
| Project/Area Number |
23740245
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics I
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
TACHIBANA Makoto 独立行政法人物質・材料研究機構, 超伝導物性ユニット, 主任研究員 (40442727)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 構造相転移 / 強誘電相転移 / 単結晶 / 熱測定 / Ｘ線散乱 / 巨大圧電物質 / 酸化物強誘電体 / モルフォトロピック相境界 / 巨大圧電応答 / 熱物性 |
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| Research Abstract |
Many transition metal oxides show interesting ferroelectric and structural phase transitions, as well as useful phenomena such as giant piezoelectric effects. In this study, structural phase transitions in pyrochlore Cd2Nb2O7 and perovskite Pr1-xLaxAlO3 were studied using x-ray scattering and specific heat measurements. Cd2Nb2O7 shows relaxor-like behavior and an unusual sequence of ferroelectric and ferroelastic transitions. Pr1-xLaxAlO3 has Jahn-Teller instabilities and shows unusual ferroelastic transitions. The results provide important perspectives on the emergence of giant piezoelectric effects in related materials.
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Report
(4 results)
Research Products
(35 results)
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[Journal Article] Experimental and ab initio investigations of the x-ray absorption near edge structure of orthorhombic LuMnO_32012
Author(s)
Y. Hu, C. N. Borca, E. Kleymenov, M. Nachtegaal, B. Delley, M. Janousch, A. Donni, M. Tachibana, H. Kitazawa, E. Takayama-Muromachi, M. Kenzelmann, C. Niedermayer, T. Lippert, A. Wokaun and C.W. Schneider
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Journal Title
Applied Physics Letters
Volume: 100
Related Report
Peer Reviewed
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