Abstract
A new layered strontium cobaltite, SrxCoO2, was synthesized by a low-temperature ion-exchange technique from a γNa0.7CoO2 precursor. The strontium content was determined to be x = 0.345 by inductively coupled plasma (ICP) analysis. Rietveld analysis of X-ray powder diffraction data indicates that strontium ions are preferentially distributed at the 2d (2/3, 1/3, 1/4) site (space group P63/mmc). The chemical content of strontium ions was determined as x = 0.346(3) relative to cobalt ions. A polycrystalline sample of Sr0.35CoO2 shows metallic electric resistivity below 300 K. The Seebeck coefficient is about 70 μV·K-1 at 300 K, which is comparable to that of γ-Na0.7CoO2.
Original language | English |
---|---|
Pages (from-to) | L337-L339 |
Journal | Japanese Journal of Applied Physics, Part 2: Letters |
Volume | 41 |
Issue number | 3 B |
DOIs | |
Publication status | Published - 2002 Mar 15 |
Keywords
- Electric resistivity
- Ion exchange
- Layered oxide
- Seebeck coefficient
- Strontium cobalt oxide
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)