Physics – Condensed Matter – Materials Science
Scientific paper
2005-05-14
Mater. Sci. Forum, 475-479, 3807 (2005)
Physics
Condensed Matter
Materials Science
4 pages, 5 figures; this paper was included in the proceedings of the 5th Pacific Rim International Conference on Advanced Mat
Scientific paper
In this paper, we report the growth of NaxCoO2 thin films by pulsed-laser deposition (PLD). It is shown that the concentration of sodium is very sensitive to the substrate temperature and the target-substrate distance due to the evaporation of sodium during the deposition. alpha prime-phase Na0.75CoO2 and gamma- phase Na0.71CoO2 thin films can be obtained with different conditions. Correspondingly, the surface morphology of the films changes from flake-like to particle-like. The temperature dependence of resistivity for the films prepared with the optimal condition shows metallic behavior, consistent with the data of NaxCoO2 single crystals. This work demonstrates that PLD is a promising technique to get high quality NaxCoO2 thin films.
Xiao Y. S.
Xie B. T.
Yang X. C.
Zhang Xiao-Ping
Zhao G.-Y.
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