Abstract
Bi9Fe5Ti3O27 is an eight-layered material belonging to the family of bismuth layered structured ferroelectromagnets. The polycrystalline sample of this compound was prepared by a standard solid-state reaction technique. The formation of the compound in an orthorhombic crystal structure was confirmed by an X-ray diffraction (XRD) technique (lattice parameters: a = 5.5045[27] Å, b = 5.6104[27] Å, c = 76.3727[27] Å). Detailed studies of surface morphology of the compound using scanning electron microscopy (SEM) exhibit that the compound has domains of plate shaped grains. Studies of dielectric and electric properties in a wide temperature range (30–500 °C) at different frequencies (100 Hz–1 MHz) exhibit an anomaly at 291 ± 2 °C, which is related to ferroelectric to paraelectric phase transition as suggested by hysteresis loop at room temperature. The values and nature of temperature variation of dc conductivity exhibit the NTCR behavior of the compound.
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Patri, S.K., Choudhary, R.N.P. & Samantaray, B.K. Studies of structural, dielectric and impedance properties of Bi9Fe5Ti3O27 ceramics. J Electroceram 20, 119–126 (2008). https://doi.org/10.1007/s10832-007-9376-z
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DOI: https://doi.org/10.1007/s10832-007-9376-z