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

123 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

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Gigantic enhancement of spin Seebeck effect by phonon drag'. Together they form a unique fingerprint.

  • 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