| Budget Amount *help |
¥29,510,000 (Direct Cost: ¥22,700,000、Indirect Cost: ¥6,810,000)
Fiscal Year 2012: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2011: ¥22,230,000 (Direct Cost: ¥17,100,000、Indirect Cost: ¥5,130,000)
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| Research Abstract |
Magnon Hall effect, which was discovered by Onose et al., have been investigated for various ferromagnetic insulators. We have observed the distinctive effect of lattice geometry on magnon Hall effect and show that it can be explained in terms of the Berry phase of magnons induced by Dzyaloshinskii-Moriya interaction. In addition, we have setup the microwave measurement system, in which we can measure the resonant excitation of magnons by microwave under the magnetic field at low temperature. With use of it, we have observed unique magnon modes (skyrmion rotation mode, skyrmion breathing mode) in a topological magnetic state of skyrmion lattice.
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