Bi+ Ions Substituted Nife2o4 Nanoparticles: Analysis of Structural, Optical, Magnetic and Dielectric Behavior

Abstract

The Bi+ ions doped spinel Nickel-Bismuth ferrite NiBixFe2-xO4 (NBF) where, x=0, 0.025, 0.050, 0.075, 0.1, 0.125, 0.150 was synthesized by sol-gel auto combustion method. The properties of prepared NBF were studied by using X-ray diffraction (XRD), UV-Vis spectroscope, Vibrating Sample Magnetometer (VSM), Fourier Transform Infrared Spectroscopy (FTIR), Atomic Force Microscope (AFM), Scanning electron microscope (SEM), etc. The structural and crystallite size were studied by XRD pattern and it shows its crystallite size decreases from 34 to 11 nm by the Bi3+ ions concentration change and lattice parameters ranging from 8.339 to 8.315 Å, confirming the formation of single-phase cubic spinel structure NBF also the crystallite size calculated by using Williamson Hall plot, is 15 to 36 nm. The energy band gap studied using UV-Vis spectroscopy decreases from 1.510 to 1.418 Ev. The dielectrics and A. C. conductivity of NBF were studied by LCR-Q meter by varying frequency.

Keywords: Spinel, Sol-gel, AFM, XRD, VSM, FTIR, UV-Vis, Dielectrics, EDAX, Conductivity, Williamson-Hall