Gigantic enhancement of spin Seebeck effect by phonon drag

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

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144 Citations (Scopus)


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
Issue number25
Publication statusPublished - 2010 Dec 20

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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