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- W1780378246 abstract "Barium lanthanum bismuth niobate Ba1−(3∕2)xLaxBi2Nb2O9 (x=0, 0.05, 0.1, and 0.15) powders have been prepared via solid state reaction route. The monophasic layered perovskite nature of each composition of these was confirmed by x-ray diffraction studies. A continuous decrease in the lattice parameter c of parent BaBi2Nb2O9 with increase in La3+ doping level was noteworthy. A decrease in dielectric constant maximum (εm), a shift in dielectric anomaly to lower temperatures (from 488to382K), and an increase in the diffuseness (γ) (from 1.58 to 1.84) of dielectric anomaly were encountered on increasing x from 0 to 0.15. Vogel-Fulcher analyses showed a decrease in freezing temperature (Tf) (from 157to40K) and an increase in the activation energy (0.53to1.12eV) for frequency dispersion with increase in La3+ content. A downward shift in the peak position of the pyroelectric coefficient with increasing La3+ doping level was observed. The observed changes in the above physical properties were attributed to the increase in A-site chemical heterogeneity as a result of aliovalent La3+ doping on Ba2+ sites and associated A-site vacancy formation." @default.
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- W1780378246 date "2007-01-01" @default.
- W1780378246 modified "2023-10-18" @default.
- W1780378246 title "Relaxor characteristics of layered Ba1−(3∕2)xLaxBi2Nb2O9 ceramics" @default.
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- W1780378246 doi "https://doi.org/10.1063/1.2392944" @default.
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