Electrical control of magnon condensation
Project/Area Number |
25706004
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Research Category |
Grant-in-Aid for Young Scientists (A)
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Allocation Type | Partial Multi-year Fund |
Research Field |
Nanostructural physics
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Research Institution | Keio University |
Principal Investigator |
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Project Period (FY) |
2013-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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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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Keywords | マグノン / スピン波 / 量子凝縮 / マグノニクス / スピントロニクス / ナノ材料 / 磁性 |
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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Report
(4 results)
Research Products
(31 results)
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[Journal Article] Spin wave differential circuit for realization of thermally stable magnonic sensors2015
Author(s)
Taichi Goto, Naoki Kanazawa, Altansargai Buyandalai, Hiroyuki Takagi, Yuichi Nakamura, Shingo Okajima, Takashi Hasegawa, Alexander B. Granovsky, Koji Sekiguchi, Caroline A. Ross and Mitsuteru Inoue,
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Journal Title
Appl. Phys. Lett.
Volume: 106
Issue: 13
Pages: 132412-132412
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] Forward volume spin wave propagation using 22 nm thick yttrium iron garnets.2016
Author(s)
A. Banno, T. Goto, N. Kanazawa, F. Kumaoka, H. Furuta, R. Morimoto, R. Isogai, M. Onbasli, Y. Nakamura, K. Sekiguchi, C. Ross and M. Inoue
Organizer
MMM | INTERMAG 2016 JOINT CONFERENCE
Place of Presentation
San Diego (USA)
Year and Date
2016-01-15
Related Report
Int'l Joint Research
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[Presentation] Spin wave differential circuit for thermally stable magnonic sensors2015
Author(s)
T. Goto, N. Kanazawa, A. Buyandalai, H. Takagi, Y. Nakamura, S. Okajima, T. Hasegawa, A. B. Granovsky, K. Sekiguchi, C. A. Ross, and M. Inoue
Organizer
International Symposium Spin Waves 2015
Place of Presentation
Saint Petersburg (Russia)
Year and Date
2015-06-11
Related Report
Int'l Joint Research
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