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 language | English (US) |
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Pages (from-to) | 633-640 |
Number of pages | 8 |
Journal | Materials Research Bulletin |
Volume | 17 |
Issue number | 5 |
DOIs | |
State | Published - May 1982 |
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering