| Project/Area Number |
23540424
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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 | Tokyo University of Science |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
NAKAJIMA Taro 理化学研究所, 研究員 (30579785)
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| Co-Investigator(Renkei-kenkyūsha) |
KITAZAWA Hideaki 物質・材料研究機構, 量子ビームユニット, ユニット長 (00195257)
TERADA Noriki 物質・材料研究機構, 量子ビームユニット, 主任研究員 (60442993)
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| Research Collaborator |
PROKES Karel Helmholtz-Zentrum Berlin für Materialienund Energie, Department Quantum Phenomena in Novel Materials
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| Project Period (FY) |
2011-04-28 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | スピン格子系 / スピンフラストレーション / マルチフェロイック / 交差相関物性 / 一軸応力 / 磁壁駆動 / スピン誘導型強誘電体 / スピン・格子系 / スピンピエゾ効果 / d-p軌道混成機構 |
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| Outline of Final Research Achievements |
By neutron diffraction and dielectric measurements, we have revealed cross-correlated phenomena in the spin-driven ferroelectric multiferroic CuFeO2 such as (1) Uniaxial stress controls of the magnetic phase transition and the spontaneous electric polarization, (2) Driving ferroelectric (helical magnetic) domain walls by the magnetic field sweeping,and (3) Electric polarization memory effect that the direction of electric polarization is memorized into none-ferroelectric 4-sublattice magnetic ground state in advance of emergence of spontaneous electric polarization in ferroelectric phase.
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