Isovalent substitution effects in the Na layer of γ-Na0.75CoO2 thermoelectric oxide

Germanas Peleckis*, Maarit Karppinen, Hisao Yamauchi

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

K and Rb substitution effects in Na layer of Na0.75CoO2 oxide are reported. K substitution caused elongation of lattice parameter c, while Rb substituted sample did not have such effect. Transport properties measured showed that all samples are metallic. Rb substitution eliminates characteristic transition point from ρ-T curves at room temperature. High temperature electrical resistivity measurements revealed, that Rb substitution significantly reduced sodium cation migration in the samples.

Original languageEnglish
Pages (from-to)485-486
Number of pages2
JournalPHYSICA C: SUPERCONDUCTIVITY AND ITS APPLICATIONS
Volume460-462 I
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 1 Sep 2007
MoE publication typeA1 Journal article-refereed

Keywords

  • NaCoO
  • Thermoelectric

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