Enhancement of dielectric and magnetic properties of 0.5BaFe12O19-0.5Bi2/3 Cu3Ti4O12 nanocomposite synthesized via chemical route

Abstract

Nanocomposite, 0.5BaFe12O19–0.5Bi2/3Cu3Ti4O12 (BHF–BCT) has been fabricated via chemical method. The phase confirmation and morphology of the synthesized nanocomposite was investigated using different characterization methods including XRD, FTIR, SEM, TEM and AFM analyses, respectively. X-ray diffraction pattern and Le-bail analysis carried out by using the Fullprof software, confirmed the phase formation of BHF–BCT. The formation of Fe–O–Fe (M–O–M) bond, Bi–O and Cu–O (M–O) bonds in the nanocomposite were investigated by Fourier-transform infrared spectroscopy (FTIR). The nanocrystalline nature of the BHF–BCT nanocomposite was confirmed by TEM analysis with the particle size of 31 ± 5 nm. Energy dispersive X-ray (EDX) spectroscopy and elemental mapping studies substantiated the purity of BHF–BCT material. FC curve displays maximum and step like transition occurs in the zero fields cooled (ZFC) curve below 170 K temperature of the BHF-BCT nanocomposite; however, M–H magnetization loop indicates the ferromagnetic behaviors of the material. BHF–BCT nanocomposite displayed very high dielectric constant (10.7 × 104) as compared to their constituent material. The electrical studies have indicated that the nanocomposite have semiconducting nature with insulating grain boundaries. © 2021