| Project/Area Number |
23740277
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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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 |
NAKAJIMA Taro 東京理科大学, 理学部, 助教 (30579785)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 強相関系 / マルチフェロイック / スピンフラストレーション / フラストレーション / 一軸圧力 |
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| Research Abstract |
We have investigated uniaxial pressure effects on strong coupling between spin, lattice and dielectric degrees of freedom in a triangular lattice antiferromagnet CuFeO2, which is known to exhibit spin-driven ferroelectricity, by means of neutron scattering, x-ray diffraction, magnetization and dielectric polarization measurements. As a result, we have found that the application of uniaxial pressure significantly affects the magnetic and crystal structures as well as spin-lattice-coupled domain structures in this system. We have demonstrated that the application of uniaxial pressure can result in a "single-domain" magnetic ground state in CuFeO2. By the neutron scattering measurements in the single-domain state, we have revealed the distinct changes in exchange interactions, which are the direct evidence for the strong spin-lattice coupling in this system. We expect that the present results contribute to further studies on cross-correlated phenomena in condensed matter physics.
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