Three-magnon splitting controlled by temperature

Saki Matsuura, Takaharu Tashiro, Kazuya Ando

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A nonlinear magnon interaction has been investigated in an yttrium iron garnet/Pt film. In the bilayer film, multiple microwave absorption signals due to the excitation of magnetostatic spin waves, including magnoeto-static surface waves and backward volume magnetostatic spin waves, were observed at room temperature. The microwave absorption spectrum was found to be changed drastically by decreasing temperature. This drastic change in the microwave absorption spectrum is attributed to the appearance of the three-magnon splitting process; the spin-wave dispersion calculated by taking into account the temperature variation of the saturation magnetization indicates that the change in the microwave absorption spectrum appears when the lowest frequency of the spin-wave dispersion becomes lower than a half of the microwave excitation frequency. At this condition, the energy and momentum conservation laws can be fulfilled in the process where a pumped magnon splits into two magnons. These results demonstrate that the nonlinear magnon interaction can be controlled not only by excitation frequency but also by temperature.

Original languageEnglish
Title of host publicationSpintronics VII
EditorsHenri-Jean Drouhin, Jean-Eric Wegrowe, Manijeh Razeghi
PublisherSPIE
ISBN (Electronic)9781628411942
DOIs
Publication statusPublished - 2014 Jan 1
EventSpintronics VII - San Diego, United States
Duration: 2014 Aug 172014 Aug 21

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9167
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherSpintronics VII
CountryUnited States
CitySan Diego
Period14/8/1714/8/21

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Keywords

  • Spin-wave resonance
  • Spintronics
  • Three-magnon splitting

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Matsuura, S., Tashiro, T., & Ando, K. (2014). Three-magnon splitting controlled by temperature. In H-J. Drouhin, J-E. Wegrowe, & M. Razeghi (Eds.), Spintronics VII [91672H] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9167). SPIE. https://doi.org/10.1117/12.2059892