Synthesis, Structural and Physical Properties of BaxNi1-xFe2O4 (0x1) Nanomaterials

Abstract

Now a days, research on nickel ferrite nanoparticles is dominated owing to their distinguished structural and physical properties resulting large scale applications in almost every field of life. This research work presents synthesis, characterization and determination of dielectric, magnetic and optical properties of barium doped nickel ferrite nanoparticles i.e. BaxNi1-xFe2O4 (0≤x≥1). These nanoparticles were successfully synthesized via hydrothermal method by applying suitable reaction conditions. XRD, SEM and EDX were used to characterize prepared nanoparticles. XRD analysis revealed that barium doped samples have cubic spinel structure and their crystallite size decreases from 72.6-42.8 nm by barium addition. SEM micrographs shows that prepared nanoparticles have spherical in shape and upon doping increase in particle size have been observed. In order to determine elemental composition EDX was employed that confirms the purity of samples as there is no impurity peak is present in EDX spectra. Band gap ranging from 2.1-5.5ev has obtained from Tauc plot. Dielectric properties like values of Dielectric constant, Dielectric loss, tan loss and AC conductivity was estimated and it is interesting to note that sample having maximum concentration of Barium have highest value of dielectric loss and dielectric constant i.e 8.3 × 104 and 2.7 × 104 Fm-1 respectively. So, it can be best candidate for charge storing applications while for AC conductivity and tan loss no periodic trend was observed but all samples show common behavior that they have large values of AC conductivity at higher frequency. Magnetic Properties was determined by Fluxgate DC magnetometer and it divulges that there is decrease in values of saturation magnetization while increase in coercivity values with doping.