Relization of giant piezpelectric response induced by polarization rotation
| Project/Area Number |
15K14119
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
Masaki Azuma 東京工業大学, 科学技術創成研究院, 教授 (40273510)
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| Co-Investigator(Kenkyū-buntansha) |
北條 元 九州大学, 総合理工学研究院, 准教授 (90611369)
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | Polarization rotation / Piezoeelctric material / giant c/a / BiFeO3 / 圧電体 / 分極回転 / 薄膜 / 機能性セラミックス / 高圧合成 |
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| Outline of Final Research Achievements |
In this study, we fabricated high-quality cobalt-substituted BiFeO3 epitaxial thin films with a giant c/a ratio by pulsed laser deposition, and systematically studied the relationship between the crystal structure and the piezoelectric responses. From crystal structure analysis, we found that all the BFCO thin films had a giant c/a ratio (1.2-1.3) same as the bulk phase and the crystal structure underwent successive transitions from MC-type monoclinic phase (x= 0-0.15) to MA-type monoclinic phase (x= 0.15-0.30), and finally to tetragonal phase (x= 0.50) with increasing Co content x. The MA phase is essentially the same as that found in the bulk BFCO where polarization rotation has been confirmed. From piezoelectric measurements, we found that the responses were enhanced in the MA phase. This indicates that polarization rotation does play a crucial role to realize improved piezoelectric responses in this material.
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Report
(3 results)
Research Products
(18 results)
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[Journal Article] A-site and B-site charge orderings in an s-d level controlled perovskite oxide PbCoO32017
Author(s)
Y. Sakai, J. Yang, R. Yu, H. Hojo, I. Yamada, P. Miao, S. Lee, S. Torii, T. Kamiyama, M. Lezaic, G. Bihlmayer, M. Mizumaki, J. Komiyama, T. Mizokawa, H. Yamamoto, T. Nishikubo, Y. Hattori, K. Oka, Y. Yin, J. Dai, W. Li, S. Ueda, A. Aimi, D. Mori, Y. Inaguma, Z. Hu, T. Uozumi, C. Jin, Y. Long, and M. Azuma
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Journal Title
J. Am. Chem. Soc.
Volume: 139
Issue: 12
Pages: 4574-4581
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Glassy Distribution of Bi3+/Bi5+ in Bi1－xPbxNiO3 and Negative Thermal Expansion Induced by Intermetallic Charge Transfer2016
Author(s)
Kiho Nakano, Kengo Oka, Tetsu Watanuki, Masaichiro Mizumaki, Akihiko Machida, Akane Agui, Hyunjeong Kim, Jun Komiyama, Takashi Mizokawa, Takumi Nishikubo, Yuichiro Hattori, Shigenori Ueda, Yuki Sakai, and Masaki Azuma
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Journal Title
Chemistry of Materials
Volume: 28
Issue: 17
Pages: 6062-6067
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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