On the preparation and characterization of "NaOHTaS2"

W. Biberacher, A. Lerf, F. Buheitel, T. Butz, A. Hübler

Research output: Contribution to journalArticle

Abstract

Intercalation compounds of 2H-TaS2 from NaOH solutions with concentrations ranging from 1mM to 5M have been prepared. We determined the superconducting transition temperature TC, the Na content x and the charge transfer n as a function of pH. At low pH (≤ 12) compounds identical to those obtained from Na0.33TaS2 by subsequent hydration are formed: Na+0.33(H2O)y[TaS2]0.33-. This phase is superconducting at 5.5 K. For samples prepared at high pH (>12) TC decreases to 2.5 K, whereas x and n increase up to 0.6 and 0.39, respectively. The discrepancy between x and n suggests a cointercalation of negative counterions. In addition we investigated the instability of these compounds against air and water.

Original languageEnglish (US)
Pages (from-to)633-640
Number of pages8
JournalMaterials Research Bulletin
Volume17
Issue number5
DOIs
StatePublished - May 1982

ASJC Scopus subject areas

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

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    Biberacher, W., Lerf, A., Buheitel, F., Butz, T., & Hübler, A. (1982). On the preparation and characterization of "NaOHTaS2". Materials Research Bulletin, 17(5), 633-640. https://doi.org/10.1016/0025-5408(82)90046-0