Abstract
Abstract The structure and lattice parameters of high quality niobium-rich potassium lithium tantalate niobate (K 0.95 Li 0.05 )(Ta 1− x Nb x )O 3 ( x =0.44–0.66) single crystals were determined by the X-ray powder diffraction technique. Dielectric properties were studied in the temperature range from 20 to 500 K. The transition temperatures were determined, and the Curie temperatures adjusted between 330 K and 480 K through the suitable selection of Ta-to-Nb ratio. The degree of relaxation ( γ ) has been estimated using the modified Curie–Weiss law. The (K 0.95 Li 0.05 )(Ta 1− x Nb x )O 3 single crystals have also shown strong dc electric field dependent dielectric behavior, and high dielectric tunability (∼43%) for x =0.44.
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