| Project/Area Number |
15K05154
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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 II
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
Sagayama Hajime 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 准教授 (90436171)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2017: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2016: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 電気磁気効果 / 交差相関 / スピン格子相互作用 / スピン軌道相互作用 / マルチフェロイクス / 交差相関物性 / エレクトロマグノン / マルチフェロイック / 磁気励起 / X線磁気回折 / 円偏光X線回折 / 中性子散乱 / スピン波 |
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| Outline of Final Research Achievements |
The object of this project is clarifying microscopic mechanism of the cross-correlation properties and understanding dinamical magnetoelectric phenomena in multiferroic materials. First, in order to understand the electromagnetic excitations observed around E ~ 2.5meV in representative spin-spiral multiferroic material TbMnO3, we have performed inelastic neutron scattering experiments. We found prabolic magnetic excitations around (1 -1 0) which is one of the crystallcraphic gamma point, although theoretical studies previously predicted that non-dispersive excitations in the L = 0 plane. Energy gap at the gamma is estimated to be 2.5 meV, which is close to that of the electromagnetic excitaions.
To obtaine fine-understanding of the electromagnetic interaction in multiferroic materials, we have performed circulay polarized x-ray diffraction experiment on single crystal sample of YFeO3. We have suceeded In observing direct coupling of the antiferroelectricity and ferromagnetisity.
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