Huge response of physical properties in ferroelectrics by quantum effects
Project/Area Number |
22340078
|
Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Condensed matter physics I
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Research Institution | Shizuoka University |
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)
|
Project Period (FY) |
2010 – 2012
|
Project Status |
Completed (Fiscal Year 2012)
|
Budget Amount *help |
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2010: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
|
Keywords | 誘電体 / 圧電体 / 強誘電体 / 量子効果 / 物性実験 / 誘電体物性 / 低温物性 / 量子相制御 / 酸化物 / 結晶成長 |
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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Report
(4 results)
Research Products
(110 results)
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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
Related Report
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
Related Report
Peer Reviewed
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[Journal Article]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
Inorg. Chem
Volume: 50
Issue: 13
Pages: 6392-6398
DOI
Related Report
Peer Reviewed
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