Abstract
Highly oriented tungsten bronze K0.4(Pb0.6Ba0.4)0.8Nb2O6 ferroelectric thin films have been prepared from metal alkoxides and metal acetate by chemical process. The formation of solid solution with potassium was found to be very effective to form the tungsten bronze phase at lower temperatures compared with (Pb0.6Ba0.4)Nb2O6. The amount of potassium in the composition of Kx(Pb0.6Ba0.4)1 − x/2Nb2O6 [0 ≤ x ≤ 0.4] is also important to crystallize in the tungsten bronze phase. K0.4(Pb0.6Ba0.4)0.8Nb2O6 films with c-axis preferred orientation were successfully synthesized on MgO(1 0 0) and Pt(1 0 0)/MgO(1 0 0) substrates above 700°C. KPBN60 thin film on Pt(1 0 0)/MgO(1 0 0) showed a remnant polarization of 20 μC/cm2 and a coercive field of 140 kV/cm at −150°C.
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Sakamoto, W., Kosugi, K., Arimoto, T. et al. Chemical Processing of Potassium Substituted (Pb0.6Ba0.4)Nb2O6 Powders and Thin Films Through Metallo-Organics. Journal of Sol-Gel Science and Technology 16, 65–75 (1999). https://doi.org/10.1023/A:1008761120956
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DOI: https://doi.org/10.1023/A:1008761120956