Spin-current-driven thermoelectric coating

Akihiro Kirihara, Ken Ichi Uchida, Yosuke Kajiwara, Masahiko Ishida, Yasunobu Nakamura, Takashi Manako, Eiji Saitoh, Shinichi Yorozu

Research output: Contribution to journalArticlepeer-review

195 Citations (Scopus)

Abstract

Energy harvesting technologies, which generate electricity from environmental energy, have been attracting great interest because of their potential to power ubiquitously deployed sensor networks and mobile electronics. Of these technologies, thermoelectric (TE) conversion is a particularly promising candidate, because it can directly generate electricity from the thermal energy that is available in various places. Here we show a novel TE concept based on the spin Seebeck effect, called 'spin-thermoelectric (STE) coating', which is characterized by a simple film structure, convenient scaling capability, and easy fabrication. The STE coating, with a 60-nm-thick bismuth-substituted yttrium iron garnet (Bi:YIG) film, is applied by means of a highly efficient process on a non-magnetic substrate. Notably, spin-current-driven TE conversion is successfully demonstrated under a temperature gradient perpendicular to such an ultrathin STE-coating layer (amounting to only 0.01% of the total sample thickness). We also show that the STE coating is applicable even on glass surfaces with amorphous structures. Such a versatile implementation of the TE function may pave the way for novel applications making full use of omnipresent heat.

Original languageEnglish
Pages (from-to)686-689
Number of pages4
JournalNature Materials
Volume11
Issue number8
DOIs
Publication statusPublished - 2012 Aug

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Spin-current-driven thermoelectric coating'. Together they form a unique fingerprint.

Cite this