2012 Fiscal Year Final Research Report
Huge response of physical properties in ferroelectrics by quantum effects
| Project/Area Number |
22340078
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Shizuoka University |
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Principal Investigator |
FU Desheng 静岡大学, 若手グローバル研究リーダー育成拠点, 特任准教授 (30422546)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 誘電体 / 圧電体 / 強誘電体 / 量子効果 |
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| Research Abstract |
In this study, we focus on the effects of quantum fluctuation on the coupling effects of electric dipoles in ferroelectrics. We found that there is a huge response of physical properties such as the dielectric and piezoelectric constants around the quantum phase transition of the Ba_1-xCa_xTiO_3 system. We also show that the influences of quantum effects are not limited to merely the temperatures close to 0 K, but can cover a large temperature range of ~100 K. We further show that Ba_1-xCa_xTiO_3(x=0.233) having a quantum phase transition has an extremely stable temperature dependence of dielectric and electromechanical responses in a large temperature range of 0 K~370 K, which may be interesting for the applications of the capacitive and piezoelectric devices working for a wide temperature range.
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[Journal Article] Omoya Ohno, Kazuhisa Uchida, Naonori Sakamoto, Desheng Fu, Naoki Wakiya, Takeshi Matsuda, and Hisao Suzuki2011
Author(s)
Omoya Ohno, Kazuhisa Uchida, Naonori Sakamoto, Desheng Fu, Naoki Wakiya, Takeshi Matsuda, and Hisao Suzuki
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Journal Title
Jpn. J. Appl. Phys
Volume: 49
Pages: 09MA11
Peer Reviewed
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[Journal Article] High-pressure synthesis and correlation between structure, magnetic and dielectric properties in LiNbO_3-type MnMO_3 (M=Ti, Sn)2011
Author(s)
Akihisa Aimi, Tetsuhiro Katsumata, Daisuke Mori, Desheng Fu, Mitsuru Itoh, Toru Kyomen, Ko-ichi Hiraki, Toshihiro Takahashi, and Yoshiyuki Inaguma
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Journal Title
Inorganic Chemistry
Volume: 50
Pages: 6392-98
Peer Reviewed
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