Abstract
Barium Bismuth Niobate (BaBi2Nb2O9) has been synthesized by solid state reaction method. The X-ray diffraction study confirms the formation of compound. Morphological analysis has been carried out from the scanning electron microscopy images and the elemental analysis from the energy dispersive spectroscopy profiles. Investigation of dielectric and ferroelectric properties of the sample was done by varying the temperature from 25 °C - 500 °C in a frequency range of 1 kHz- 1 MHz. At 100 kHz, the phase transition was observed at 214.02°C. Further, this ferroelectric bi-layered perovskite exhibits an interesting relaxor behavior with a strong dispersion of the dielectric permittivity. A detailed study on the impedance spectroscopy over a wide range of temperature and frequency exhibits the contribution of grain ad grain boundary on different electrical parameters. From modulus spectroscopy, the presence of non-Debye type of relaxation in the material has been manifested. The complex modulus plots support the negative temperature coefficient of resistance (NTCR) type behavior of the material.
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Patri, S.K., Deepti, P.L., Choudhary, R.N.P. et al. Dielectric, impedance and modulus spectroscopy of BaBi2Nb2O9. J Electroceram 40, 338–346 (2018). https://doi.org/10.1007/s10832-018-0135-0
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DOI: https://doi.org/10.1007/s10832-018-0135-0