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Preparation and Properties of Lithium-doped K0.5Na0.5NbO3 Thin Films by Chemical Solution Deposition

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4 Author(s)
Maiwa, H. ; Shonan Inst. of Technol., Fujisawa ; Kogure, T. ; Ishizaka, K. ; Hayashi, T.

Lithium doped K0.5Na0.5NbO3 films were fabricated by chemical solution deposition on Pt/TiO2/SiO2/Si substrates. Homogeneous and stable precursor solutions were prepared by controlling the reaction of starting metal alkoxides. Perovskite KNN single phase thin films were successfully synthesized on Pt/TiOx/SiO2/Si substrates. The 1.2 mum-thick KLNN film annealed at 650degC exhibited a ferroelectric polarization hysteresis loops at -250degC. The loop at room temperature is round in shape indicating the film contains leakage components. Dielectric constant under zero bias is 490 at room temperature. Typical upside-down butterfly DC bias-capacitance curve was obtained in the KLNN film capacitors at room temperature, indicating polarization reversal occurs in the obtained KLNN films.

Published in:

Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on

Date of Conference:

27-31 May 2007