| Project/Area Number |
16K14235
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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 |
Electronic materials/Electric materials
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
Norifumi Fujimura 大阪府立大学, 工学(系)研究科(研究院), 教授 (50199361)
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| Project Period (FY) |
2016-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | THz発振 / 強相関係物質 / 強誘電体 / 光誘起電流 / YMnO3 / 強相関強誘電体 / THz電磁波 |
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| Outline of Final Research Achievements |
By monitoring the optical emission from the plasma during deposition, excellent epitaxial films of YbFe2O4, YMnO3, BiFeO3 were successfully obtained. Novel phenomena such as photo-induced current and spin modulation were clearly recognized in YbFe2O4, fims. For the YMnO3 films, the relationship between photo-induced current and polarization switching and an oscillatory structure with a frequency of 5.1 THz, which is assigned to the coherent optical phonon with A1 symmetry. The oscillatory structure with a frequency 0.58 originated from magnon was observed as well. In the case of BiFeO3 epitaxial fims, the oscillatory structure with a frequency of 2.5 THz by coherent optical phonon was recognized.
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