Thermoelectric properties of selenospinel Cu 6Fe 4Sn 12Se 32

Koichiro Suekuni, Masaru Kunii, Hirotaka Nishiate, Michihiro Ohta, Atsushi Yamamoto, Mikio Koyano

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

This report describes thermoelectric properties up to 500 K for polycrystalline selenospinel Cu 6Fe 4Sn 12Se 32 samples. Thermal conductivity shows a low value of 1 W/Km because of their structural complexity such as Fe/Sn site disorder. Electrical resistivity ρ varies as exp(T 0/T 1/4) and thermopower S varies as T 1/2 at low temperatures, which indicates that Mott variable-range hopping is the dominant conduction mechanism. However, at high temperatures (above 350 K), ρ and S decrease simultaneously. The temperature dependences are attributed to the thermal excitation of electrons. The possible band structure for Cu 6Fe 4Sn 12Se 32 is examined to clarify the behavior of ρ and S.

Original languageEnglish
Pages (from-to)1130-1133
Number of pages4
JournalJournal of Electronic Materials
Volume41
Issue number6
DOIs
Publication statusPublished - Jun 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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