Magnon instability driven by heat current in magnetic bilayers

Yuichi Ohnuma, Hiroto Adachi, Eiji Saitoh, Sadamichi Maekawa

研究成果: Article査読

8 被引用数 (Scopus)

抄録

We theoretically demonstrate that, in a ferromagnet/paramagnet bilayer, a magnon instability accompanied by a gigahertz microwave emission can be driven simply by means of a temperature bias. Employing many-body theory for investigating the effects of a phonon heat current on the magnon lifetime, we show that the magnon instability occurs upon the suppression of the umklapp scattering at low temperatures, leading to microwave emission. The present finding provides crucial information about the interplay of spin current and heat current.

本文言語English
論文番号224404
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
92
22
DOI
出版ステータスPublished - 2015 12月 2

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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