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Surface morphology, structure and transport property of NaxCoO2 thin films grown by pulsed laser deposition

X. P. Zhang·Y. S. Xiao·H. Zhou·B. T. Xie·C. X. Yang·Y. G. Zhao
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Abstract

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.

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X. P. Zhang, Y. S. Xiao, H. Zhou, B. T. Xie, C. X. Yang, Y. G. Zhao. 2005-05-14. Surface morphology, structure and transport property of NaxCoO2 thin films grown by pulsed laser deposition. https://arxiv.org/abs/cond-mat/0505360

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