| Budget Amount *help |
¥25,350,000 (Direct Cost: ¥19,500,000、Indirect Cost: ¥5,850,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2014: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2013: ¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
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| Outline of Final Research Achievements |
We studied the formation of Bose-Einstein condensation of magnons by electrical excitation methods to investigate the quantum coherence in magnon gases. In a ferromagnetic metals, we have succeeded in observing a clear spin wave waveform of backward volume wave (BVW) which is essential to realize the condensation. The increase of magnon density is quantitatively observed by utilizing magnon interference effect. While in a ferromagnetic insulator (yttrium iron garnet), we have detected Bose-Einstein condensate in the presence of temperature gradient. The Brillouin light scattering spectroscopy was successfully improved to harness wavevector- and time-resolutions.
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