Unidirectional spin-wave heat conveyer

T. An, V. I. Vasyuchka, K. Uchida, A. V. Chumak, K. Yamaguchi, K. Harii, J. Ohe, M. B. Jungfleisch, Y. Kajiwara, Hiroto Adachi, B. Hillebrands, S. Maekawa, E. Saitoh

Research output: Contribution to journalArticle

79 Citations (Scopus)

Abstract

When energy is introduced into a region of matter, it heats up and the local temperature increases. This energy spontaneously diffuses away from the heated region. In general, heat should flow from warmer to cooler regions and it is not possible to externally change the direction of heat conduction. Here we show a magnetically controllable heat flow caused by a spin-wave current. The direction of the flow can be switched by applying a magnetic field. When microwave energy is applied to a region of ferrimagnetic Y3Fe 5O12, an end of the magnet far from this region is found to be heated in a controlled manner and a negative temperature gradient towards it is formed. This is due to unidirectional energy transfer by the excitation of spin-wave modes wit hout time-reversal symmetry and to the conversion of spin waves into heat. When a Y3Fe5O12 film with low damping coefficients is used, spin waves are observed to emit heat at the sample end up to 10 mm away from the excitation source. The magnetically controlled remote heating we observe is directly applicable to the fabrication of a heat-flow controller.

Original languageEnglish
Pages (from-to)549-553
Number of pages5
JournalNature Materials
Volume12
Issue number6
DOIs
Publication statusPublished - Jun 2013

Fingerprint

Spin waves
magnons
heat transmission
heat
Heat transfer
coolers
Heat conduction
conductive heat transfer
Thermal gradients
Energy transfer
excitation
Magnets
energy
temperature gradients
controllers
magnets
Damping
damping
energy transfer
Microwaves

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Condensed Matter Physics
  • Materials Science(all)
  • Chemistry(all)

Cite this

An, T., Vasyuchka, V. I., Uchida, K., Chumak, A. V., Yamaguchi, K., Harii, K., ... Saitoh, E. (2013). Unidirectional spin-wave heat conveyer. Nature Materials, 12(6), 549-553. https://doi.org/10.1038/nmat3628

Unidirectional spin-wave heat conveyer. / An, T.; Vasyuchka, V. I.; Uchida, K.; Chumak, A. V.; Yamaguchi, K.; Harii, K.; Ohe, J.; Jungfleisch, M. B.; Kajiwara, Y.; Adachi, Hiroto; Hillebrands, B.; Maekawa, S.; Saitoh, E.

In: Nature Materials, Vol. 12, No. 6, 06.2013, p. 549-553.

Research output: Contribution to journalArticle

An, T, Vasyuchka, VI, Uchida, K, Chumak, AV, Yamaguchi, K, Harii, K, Ohe, J, Jungfleisch, MB, Kajiwara, Y, Adachi, H, Hillebrands, B, Maekawa, S & Saitoh, E 2013, 'Unidirectional spin-wave heat conveyer', Nature Materials, vol. 12, no. 6, pp. 549-553. https://doi.org/10.1038/nmat3628
An T, Vasyuchka VI, Uchida K, Chumak AV, Yamaguchi K, Harii K et al. Unidirectional spin-wave heat conveyer. Nature Materials. 2013 Jun;12(6):549-553. https://doi.org/10.1038/nmat3628
An, T. ; Vasyuchka, V. I. ; Uchida, K. ; Chumak, A. V. ; Yamaguchi, K. ; Harii, K. ; Ohe, J. ; Jungfleisch, M. B. ; Kajiwara, Y. ; Adachi, Hiroto ; Hillebrands, B. ; Maekawa, S. ; Saitoh, E. / Unidirectional spin-wave heat conveyer. In: Nature Materials. 2013 ; Vol. 12, No. 6. pp. 549-553.
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