Abstract

Single crystals of quaternary solid solution compositions of A-site filled tungsten bronze-type α(Ba1−xSrx)Nb2O6:β(Na1−yKy)NbO3 (where α:β=2:1, 9:2, x=0.75, 0.60, and y=0.50, 0.40, and 0.25) have been grown by the laser heated pedestal growth technique, both along the a axis and the c axis. The crystal growth studies, the crystallographic parameter analysis, the dielectric properties as well as the thermal expansion behavior of the as grown single crystals are reported. Compositions with low ratios of Ba and Na in the 2:1 section plane have high polarizability, low dielectric loss, and ferroelectric relaxor characteristics.

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