Long-range spin Seebeck effect and acoustic spin pumping

K. Uchida, Hiroto Adachi, T. An, T. Ota, M. Toda, B. Hillebrands, S. Maekawa, E. Saitoh

Research output: Contribution to journalArticle

169 Citations (Scopus)

Abstract

Imagine that a metallic wire is attached to a part of a large insulator, which itself exhibits no magnetization. It seems impossible for electrons in the wire to register where the wire is positioned on the insulator. Here we found that, using a Ni81Fe19/Pt bilayer wire on an insulating sapphire plate, electrons in the wire recognize their position on the sapphire. Under a temperature gradient in the sapphire, surprisingly, the voltage generated in the Pt layer is shown to reflect the wire position, although the wire is isolated both electrically and magnetically. This non-local voltage is due to the coupling of spins and phonons: the only possible carrier of information in this system. We demonstrate this coupling by directly injecting sound waves, which realizes the acoustic spin pumping. Our finding provides a persuasive answer to the long-range nature of the spin Seebeck effect 1-8, and it opens the door to 'acoustic spintronics' in which sound waves are exploited for constructing spin-based devices.

Original languageEnglish
Pages (from-to)737-741
Number of pages5
JournalNature Materials
Volume10
Issue number10
DOIs
Publication statusPublished - Oct 2011

Fingerprint

Seebeck effect
pumping
Acoustics
wire
Wire
acoustics
Aluminum Oxide
Sapphire
sapphire
sound waves
insulators
Acoustic waves
Magnetoelectronics
Electrons
registers
Electric potential
electric potential
Phonons
Thermal gradients
Magnetization

ASJC Scopus subject areas

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

Cite this

Uchida, K., Adachi, H., An, T., Ota, T., Toda, M., Hillebrands, B., ... Saitoh, E. (2011). Long-range spin Seebeck effect and acoustic spin pumping. Nature Materials, 10(10), 737-741. https://doi.org/10.1038/nmat3099

Long-range spin Seebeck effect and acoustic spin pumping. / Uchida, K.; Adachi, Hiroto; An, T.; Ota, T.; Toda, M.; Hillebrands, B.; Maekawa, S.; Saitoh, E.

In: Nature Materials, Vol. 10, No. 10, 10.2011, p. 737-741.

Research output: Contribution to journalArticle

Uchida, K, Adachi, H, An, T, Ota, T, Toda, M, Hillebrands, B, Maekawa, S & Saitoh, E 2011, 'Long-range spin Seebeck effect and acoustic spin pumping', Nature Materials, vol. 10, no. 10, pp. 737-741. https://doi.org/10.1038/nmat3099
Uchida K, Adachi H, An T, Ota T, Toda M, Hillebrands B et al. Long-range spin Seebeck effect and acoustic spin pumping. Nature Materials. 2011 Oct;10(10):737-741. https://doi.org/10.1038/nmat3099
Uchida, K. ; Adachi, Hiroto ; An, T. ; Ota, T. ; Toda, M. ; Hillebrands, B. ; Maekawa, S. ; Saitoh, E. / Long-range spin Seebeck effect and acoustic spin pumping. In: Nature Materials. 2011 ; Vol. 10, No. 10. pp. 737-741.
@article{254d493d55d845978b761d59632edaa4,
title = "Long-range spin Seebeck effect and acoustic spin pumping",
abstract = "Imagine that a metallic wire is attached to a part of a large insulator, which itself exhibits no magnetization. It seems impossible for electrons in the wire to register where the wire is positioned on the insulator. Here we found that, using a Ni81Fe19/Pt bilayer wire on an insulating sapphire plate, electrons in the wire recognize their position on the sapphire. Under a temperature gradient in the sapphire, surprisingly, the voltage generated in the Pt layer is shown to reflect the wire position, although the wire is isolated both electrically and magnetically. This non-local voltage is due to the coupling of spins and phonons: the only possible carrier of information in this system. We demonstrate this coupling by directly injecting sound waves, which realizes the acoustic spin pumping. Our finding provides a persuasive answer to the long-range nature of the spin Seebeck effect 1-8, and it opens the door to 'acoustic spintronics' in which sound waves are exploited for constructing spin-based devices.",
author = "K. Uchida and Hiroto Adachi and T. An and T. Ota and M. Toda and B. Hillebrands and S. Maekawa and E. Saitoh",
year = "2011",
month = "10",
doi = "10.1038/nmat3099",
language = "English",
volume = "10",
pages = "737--741",
journal = "Nature Materials",
issn = "1476-1122",
publisher = "Nature Publishing Group",
number = "10",

}

TY - JOUR

T1 - Long-range spin Seebeck effect and acoustic spin pumping

AU - Uchida, K.

AU - Adachi, Hiroto

AU - An, T.

AU - Ota, T.

AU - Toda, M.

AU - Hillebrands, B.

AU - Maekawa, S.

AU - Saitoh, E.

PY - 2011/10

Y1 - 2011/10

N2 - Imagine that a metallic wire is attached to a part of a large insulator, which itself exhibits no magnetization. It seems impossible for electrons in the wire to register where the wire is positioned on the insulator. Here we found that, using a Ni81Fe19/Pt bilayer wire on an insulating sapphire plate, electrons in the wire recognize their position on the sapphire. Under a temperature gradient in the sapphire, surprisingly, the voltage generated in the Pt layer is shown to reflect the wire position, although the wire is isolated both electrically and magnetically. This non-local voltage is due to the coupling of spins and phonons: the only possible carrier of information in this system. We demonstrate this coupling by directly injecting sound waves, which realizes the acoustic spin pumping. Our finding provides a persuasive answer to the long-range nature of the spin Seebeck effect 1-8, and it opens the door to 'acoustic spintronics' in which sound waves are exploited for constructing spin-based devices.

AB - Imagine that a metallic wire is attached to a part of a large insulator, which itself exhibits no magnetization. It seems impossible for electrons in the wire to register where the wire is positioned on the insulator. Here we found that, using a Ni81Fe19/Pt bilayer wire on an insulating sapphire plate, electrons in the wire recognize their position on the sapphire. Under a temperature gradient in the sapphire, surprisingly, the voltage generated in the Pt layer is shown to reflect the wire position, although the wire is isolated both electrically and magnetically. This non-local voltage is due to the coupling of spins and phonons: the only possible carrier of information in this system. We demonstrate this coupling by directly injecting sound waves, which realizes the acoustic spin pumping. Our finding provides a persuasive answer to the long-range nature of the spin Seebeck effect 1-8, and it opens the door to 'acoustic spintronics' in which sound waves are exploited for constructing spin-based devices.

UR - http://www.scopus.com/inward/record.url?scp=80053053787&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80053053787&partnerID=8YFLogxK

U2 - 10.1038/nmat3099

DO - 10.1038/nmat3099

M3 - Article

VL - 10

SP - 737

EP - 741

JO - Nature Materials

JF - Nature Materials

SN - 1476-1122

IS - 10

ER -