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Ionic Conductivities of Doped CeO2 Thin Films as Related to Their Microstructure

  • Chunyan Tian (a1) and Siu-Wai Chan (a1)

Abstract

Thin films of 4% Y2O3 doped CeO2/Pd film/(001)LaA103 with a very low pinhole density were successfully prepared using electron-beam deposition technique. The microstructure of the films was characterized by x-ray diffraction and the electrical properties were studied as a function of temperature with AC impedance spectroscopy. A brick layer model was adopted to correlate the electrical properties to the microstructure of the films, which can be simplified as either a series or a parallel equivalent circuit associated with either a fine grain or a columnar grain structure, respectively. The conductivities of the films fell between the conductivities derived from the two circuit models, suggesting that the films are of a mixed fine grain and columnar grain structure. The measured dielectric constants of the films were found smaller than that of the bulk.

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1. Subbarao, E. C. and Maiti, H. S., Solid State Ionics, 11, 317338 (1984).
2. Steele, B. C. H., Solid State lonics, 12, 391406 (1984).
3. Visco, Steven J., Wang, Li-Shun, Souza, Selmar, and De Jonghe, L. C., to be published in Mat. Res. Soc. Symp. Proc., 1994.
4. Wang, Da Yu, Park, D. S., Griffith, J. and Nowick, A.S., Solid State Ionics, 2, 95105 (1981).
5. Kueper, Timothy W., Visco, Steven J. and De Jonghe, L. C., Solid State lonics, 52, 251259 (1992).
6. Vollman, Markus and Waser, Rainer, J.Am. Ceram. Soc., 77 [1], 235243 (1994).
7. Gerhardt, R. and Nowick, A. S., J. Am. Ceram. Soc., 69 [9], 641646 (1986).
8. Macdonald, J. Ross, Impedance Spectroscopy.: Emphasizing Solid Materials and Systems, New York: Wiley, c1987.
9. Shaw, Thomas M. et al, J. Integrated ferroelectrics, 7,449 (1994).

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