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This work focuses on the detailed crystal structure and dielectric properties of LaCrO3 and Ni-doped LaCrO3 (LaCr 0. 9 Ni 0. 1 O 3) compounds. Both the samples were synthesized via the auto-combustion route. The orthorhombic crystal structure with Pbnm space group of both the synthesized samples was confirmed using X-ray diffraction measurements. The average crystallite size of LaCr 0. 9 Ni 0. 1 O3compound is 52.71 nm which was determined from the Debye Scherrer formula. In Ni-doped LaCrO3compound, the formation of Cr 4 + ions at the octahedral sites affects the dielectric properties. Enhancement in AC conductivity in LaCr 0. 9 Ni 0. 1 O3 compound is due to the hopping of charge carriers in the material. [ABSTRACT FROM AUTHOR]

Herein, polycrystalline composites of the type (1-x) Bi0.9La0.05Sr0.05FeO3 (BLSFO)– (x)BaTi0.8Zr0.2O3 (BTZO) with x = 0.05, 0.1, and 0.15 synthesized via high temperature solid state reaction route are reported. The structural, microstructural, electrical, and magnetic characteristics were outlined. The presence of BLSFO (R 3 c) and BTZO phase (P 4 m m) in the composite was confirmed by carrying out Rietveld refinement of X-ray diffraction (XRD) data. From the field effect scanning electron microscopic (FESEM) images, non-homogeneous grains and grain boundary were identified. The study of energy-dispersive analysis of X-ray (EDAX) spectrum revealed the elemental composition of these composites with absence of any foreign element. Furthermore, room temperature electrical properties of these composite systems were emphasized. Dielectric constant and loss value of all the composites decreases as frequency increases attributed to Maxwell–Wagner type of relaxation. The electrical modulus and impedance spectrum demonstrates a deviation from an ideal Debye-like relaxation process. The P-E hysteresis loop of composite improves as BTZO concentration increases arising from better ferroelectric nature of BTZO ceramic. As the BTZO content increases, the M-H hysteresis loop of composites makes transition from ferromagnetic to paramagnetic nature. [ABSTRACT FROM AUTHOR]