| Project/Area Number |
22K14694
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 34010:Inorganic/coordination chemistry-related
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| Research Institution | Kyushu University |
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Principal Investigator |
Wu Shu-Qi 九州大学, 先導物質化学研究所, 助教 (30869524)
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| Project Period (FY) |
2022-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2022: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | Magnetoelectric Coupling / Electric Polarization / Molecular Materials / Magnetoelectric coupling / Pyroelectricity / Molecuar materials / Molecular magnetism / Spin frustration |
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| Outline of Research at the Start |
Magnetic field-induced polarization change provides a way for a mutual control of electric and magnetic properties, as shown in condensed matter systems. Here we hope to extend the scope to molecular systems, realizing magnetic field effect in spin frustrated molecules without long-range ordering.
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| Outline of Final Research Achievements |
Polarization is one of the most important property of materials. In this work, we focused on the magnetic field-induced polarization switching in molecular materials lacking long-range ordering (0D systems). Particularly, we investigated the polar polynuclear complexes with magnetic structures that could be tuned by magnetic fields (e.g. antiferromagnetic or frustrated systems). In these two years, we have successfully obtained a spin-crossover complex exhibiting largest field-induced polarization up to date. Besides, we also screened out an antiferromagnetic trinuclear Fe complex exhibiting polarization change during phase transition. Pulsed magnetic fields measurements revealed that it possesses a spin ground state that could be switched by magnetic field of 97 T. Another single-molecule magnet with a non-collinear spin structure was also shown to exhibit magnetic field-induced polarization current, featuring a clear non-linear effect.
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| Academic Significance and Societal Importance of the Research Achievements |
This research contributes to material science by synthesizing new materials with optimized performance. Moreover, it enhances our understanding of magnetic molecules with entangled magnetization and polarization. Development of these materials may lead to next-generation magnetoelectric devices.
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