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Crystal Research and Technology |
Cryst. Res. Technol. 39,
572 (2004) - Abstract -
Growth and morphology of the single crystals of thermoelectric oxide material NaxCoO2
C. Thinaharan, D. K. Aswal, A. Singh, S. Bhattacharya, N. Joshi, S. K. Gupta, and J. V. Yakhmi
Technical Physics & Prototype Engineering Division, Bhabha Atomic Research Center, Mumbai 400 085, India
| Keywords | flux growth, thermoelectric oxide materials, AFM, XRD |
| PACS | 81.10.–h, 82.37.Gk, 61.10.Nz |
| DOI | 10.1002/crat.200310226 |
We have grown single crystals of recently discovered thermoelectric oxide material NaxCoO2 using NaCl flux. Crystals of sizes upto 1.5 x 1.5 x 1.5 mm3 having different morphological habits were reproducibly grown. The atomic force microscopic studies show that along c-axis crystals grow via 2D layer-by-layer mechanism. The X-ray diffraction analyses show that grown crystals are rich in Na content as compared to the starting charge indicating that NaCl flux also acts as a source of Na. The resistivity of the crystals exhibited a linear temperature dependence in the region between 30 and 300 K.
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