Low-temperature physical and thermoelectric properties of Ba 8Ni5Ge41

Jingtao Xu, Jiazhen Wu, Yoichi Tanabe, Satoshi Heguri, Gang Mu, Hidekazu Shimotani, Katsumi Tanigaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Resistivity, Hall resistivity, thermopower, thermal conductivity and magnetization are reported for polycrystalline Ba8Ni 5Ge41. Ba8Ni5Ge41 is diamagnetic with susceptibility χdia = (-2.4 to -2.82) × 10-7 emu/g. Semiconductor-like behavior was observed for the resistivity. The thermopower shows positive values for a wide temperature range. The Hall resistivity indicates the dominance of electrons, suggesting the existence of multiband conductance. At room temperature, the thermal conductivity is 1.78(5) W/K m. The highest ZT of Ba8Ni 5Ge41 is 0.0016 at about 278 K.

Original languageEnglish
Pages (from-to)2025-2029
Number of pages5
JournalJournal of Electronic Materials
Volume42
Issue number7
DOIs
Publication statusPublished - 2013 Jul

Keywords

  • Clathrates
  • multiband conduction
  • thermoelectric
  • zintl phase

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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