| Project/Area Number |
22740214
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2010: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | 強相関系 / 磁性強誘電体 / マルチフェロイックス / ドメインウォール / 非線形ダイナミクス |
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| Research Abstract |
I have completely clarified the magnetoelectric phase diagram of the multiferroic Mn perovskites through constructing their microscopic spin model and analyzing it using Monte-Carlo method for the first time in the world. I have also elucidated their phase diagrams in magnetic fields, a mechanism of the field-induced electric transition, and a mechanism of the electromagnon excitations activated by oscillating electric-field component of light in the study on magnetoelectric cross-correlation responses of this class of materials. Also I have predicted the optical switching of spin chirality via the intense electromagnon excitations, and have clarified the chirality reversal and flop processes accompanied by characteristic spatial-pattern formations with dynamical chirality-domain stripes.
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