2016年5月
Wave-vector-dependent spin pumping as a probe of exchange-coupled magnons
PHYSICAL REVIEW B
- ,
- ,
- ,
- 巻
- 93
- 号
- 18
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.93.184429
- 出版者・発行元
- AMER PHYSICAL SOC
We demonstrate that short-wavelength exchange-coupled magnons can be identified electrically through the combination of their spin-pumping and damping properties in a metal/magnetic insulator heterostructure. We present clear wave-vector dependence of the spin pumping from parametrically excited exchange-coupled magnons in the heterostructure. The efficiency of spin pumping by dipole-exchange magnons was measured to be sensitive to their wave numbers and propagation angles, while the efficiency was found to be almost constant in the exchange limit. This dependence enabled us to uncover nontrivial dual bistability in the system originating from drastic change in dominant nonequilibrium magnon modes. These findings pave a path for direct electric access to short-wavelength spin dynamics that cannot be probed by optical techniques.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevB.93.184429
- ISSN : 2469-9950
- eISSN : 2469-9969
- Web of Science ID : WOS:000376636400006