2013 Fiscal Year Final Research Report
Gigantic magnetoelectric resonance with electromagnons in multiferroics
| Project/Area Number |
24840012
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics I
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2012-08-31 – 2014-03-31
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| Keywords | 強相関電子系 / 物性実験 / 光物性 |
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| Research Abstract |
We investigated a novel spinwave excitation, termed electromagnon, in the multiferroics, in which the magnetism and ferroelectricity are strongly coupled with each other. We demonstrated an enhancement of the electromagnon and their optical magnetoelectric effect 20 times as large as previous one on the cycloidal magnet by using the external magnetic field. We also succeeded in observing the magnetochiral effect on electromagnon resonance driven by the screw spin structure, leading to the gigantic directional dichroism in the terahertz region.
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