論文

査読有り
2016年5月

Wave-vector-dependent spin pumping as a probe of exchange-coupled magnons

PHYSICAL REVIEW B
  • Masaya Fukami
  • ,
  • Yuma Tateno
  • ,
  • Koji Sekiguchi
  • ,
  • Kazuya Ando

93
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
DOI
https://doi.org/10.1103/PhysRevB.93.184429
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000376636400006&DestApp=WOS_CPL
ID情報
  • DOI : 10.1103/PhysRevB.93.184429
  • ISSN : 2469-9950
  • eISSN : 2469-9969
  • Web of Science ID : WOS:000376636400006

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