Toroidal ferroelectricity and photoresponse in ferroelectric nanocrystals
| Project/Area Number |
26400306
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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 I
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
HAKUTA Yukiya 産業技術総合研究所, 主任研究員 (30250707)
SUE Kiwamu 産業技術総合研究所, 主任研究員 (60333845)
TAKASHIMA Hiroshi 産業技術総合研究所, 主任研究員 (10357353)
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| Research Collaborator |
MATSUSHIMA Kohei
MAKIGUCHI Kei
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 強誘電性ナノ結晶 / トロイダル秩序 / ナノ秩序形成 / 高分解能広帯域光散乱分光 / 自己相似性 / フラクトン / 広帯域光散乱分光 / 強誘電性ナノ秩序形成ダイナミクス / 第二次高調波発生 / トロイダル強誘電性 / チタン酸バリウム / 第二高調波発生 / ハイパーレーリー散乱 / トロイダルソフトモード / 強誘電体 / SHG / 強誘電性ﾅﾉ結晶 / ラマン散乱 / ブリルアン散乱 |
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| Outline of Final Research Achievements |
High-resolution broadband light scattering spectroscopy and second harmonic generation (SHG) measurement were performed in barium titanate nanocrystals prepared by supercritical hydrothermal synthesis, in order to elucidate the mechanism of a novel ferroelectric transition derived from nanostructures. Temperature dependence of the observed broadband spectra in the nanocrystals of barium titanate shows a characteristic self-similarity. The results of the broadband spectra in the nanocrystals of barium titanate indicate that the ferroelectric nano-ordering is accompanied with anomalies of the hierarchical phonon behavior and SHG intensity, which is not in the bulk system.
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Report
(4 results)
Research Products
(23 results)
