Phase transition in the layered ternary copper sulfide [α BaCu4S3]

T. Ohtani, T. Hoshino, A. Tsujinouchi, M. Hasegawa, N. Nagaoka, Y. Yokota, Y. Okada

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Abstract

The layered ternary copper sulfide a BaCu4S3 showed a peritectic-like decomposition at 816-911 K, in contrast to the earlier report. Electrical resistivity ρ{variant} and differential scanning calorimetry (DSC) measurements showed a phase transition at 188-205 K, which was associated with a sharp increase of ρ{variant} on cooling. The electron diffraction studies revealed that the transition was accompanied by the superlattice formation with a wave vector of q = (1/5)b*. The transition is possibly associated with a positional order-disordering or a charge-density-wave formation. It was proposed that the relatively high conductivity originates from atomic vacancies.

Original languageEnglish
Pages (from-to)161-167
Number of pages7
JournalMaterials Research Bulletin
Volume30
Issue number2
DOIs
Publication statusPublished - Feb 1995

Keywords

  • Barium
  • Copper
  • Sulfides

ASJC Scopus subject areas

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

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    Ohtani, T., Hoshino, T., Tsujinouchi, A., Hasegawa, M., Nagaoka, N., Yokota, Y., & Okada, Y. (1995). Phase transition in the layered ternary copper sulfide [α BaCu4S3]. Materials Research Bulletin, 30(2), 161-167. https://doi.org/10.1016/0025-5408(94)00112-X