Gigantic enhancement of spin Seebeck effect by phonon drag

Hiroto Adachi, Ken Ichi Uchida, Eiji Saitoh, Jun Ichiro Ohe, Saburo Takahashi, Sadamichi Maekawa

Research output: Contribution to journalArticle

115 Citations (Scopus)

Abstract

We investigate both theoretically and experimentally a gigantic enhancement of the spin Seebeck effect in a prototypical magnet LaY2 Fe 5 O12 at low temperatures. Our theoretical analysis sheds light on the important role of phonons; the spin Seebeck effect is enormously enhanced by nonequilibrium phonons that drag the low-lying spin excitations. We further argue that this scenario gives a clue to understand the observation of the spin Seebeck effect that is unaccompanied by a global spin current, and predict that the substrate condition affects the observed signal.

Original languageEnglish
Article number252506
JournalApplied Physics Letters
Volume97
Issue number25
DOIs
Publication statusPublished - Dec 20 2010

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Seebeck effect
drag
augmentation
phonons
magnets
excitation

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Adachi, H., Uchida, K. I., Saitoh, E., Ohe, J. I., Takahashi, S., & Maekawa, S. (2010). Gigantic enhancement of spin Seebeck effect by phonon drag. Applied Physics Letters, 97(25), [252506]. https://doi.org/10.1063/1.3529944

Gigantic enhancement of spin Seebeck effect by phonon drag. / Adachi, Hiroto; Uchida, Ken Ichi; Saitoh, Eiji; Ohe, Jun Ichiro; Takahashi, Saburo; Maekawa, Sadamichi.

In: Applied Physics Letters, Vol. 97, No. 25, 252506, 20.12.2010.

Research output: Contribution to journalArticle

Adachi, H, Uchida, KI, Saitoh, E, Ohe, JI, Takahashi, S & Maekawa, S 2010, 'Gigantic enhancement of spin Seebeck effect by phonon drag', Applied Physics Letters, vol. 97, no. 25, 252506. https://doi.org/10.1063/1.3529944
Adachi H, Uchida KI, Saitoh E, Ohe JI, Takahashi S, Maekawa S. Gigantic enhancement of spin Seebeck effect by phonon drag. Applied Physics Letters. 2010 Dec 20;97(25). 252506. https://doi.org/10.1063/1.3529944
Adachi, Hiroto ; Uchida, Ken Ichi ; Saitoh, Eiji ; Ohe, Jun Ichiro ; Takahashi, Saburo ; Maekawa, Sadamichi. / Gigantic enhancement of spin Seebeck effect by phonon drag. In: Applied Physics Letters. 2010 ; Vol. 97, No. 25.
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