A Study of Structural, Electrical, and Magnetic Properties of (1-x) Bi0.9La0.05Sr0.05FeO3 - (x) BaTi0.8Zr0.2O3 [x=0.05, 0.1, and 0.15] Composite Systems

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.