Wet-chemistry synthesis and dielectric properties of pure and Rb and V doped Cs$_{2}$Nb$_{4}$O$_{11}$

Cs$_{2}$Nb$_{4}$O$_{11 }$(CNO) is an antiferroelectric compound whose single crystal structure and antiferroelectric properties have been recently reported [1]. It has a space group of Pnna and a phase transition temperature at 165 $^{o}$C. In this study we synthesized CNO powdered samples, both pure and doped with rubidium and vanadium, by using a wet-chemistry method. Dielectric measurements showed that the phase transition temperature shifted with the doping. We analyzed the mechanism of this antiferroelectric phase transition based on the observed results. [1] Robert W. Smith, Chunhua Hu, Jianjun Liu, Wai-Ning Mei, Kuan-Jiuh Lin, J. Solid State Chem. 180 (2007) 1193-1197.