Effect of Calcination Temperature on the Optical and Magnetic Properties of NiFe2O4- KFeO2 Nanocomposite Films Synthesized via WOSW Sol-Gel Route for Opto-Magnetic Applications

NiFe2O4- KFeO2 nanocomposite thin films on glass and silicon substrates was synthesized via a without surfactant and water (WOSW) sol-gel route, calcined at 300 degrees C, 400 degrees C, and 600 degrees C. The structural, optical, and magnetic properties of the films were characterized. The obtained X-ray diffraction (XRD) results indicate the crystallite size dependence on the calcination temperature. Scanning electron microscopy revealed that the nanomagnetic particles were regularly grown and spherical in shape. The particle nano size and surface area increased with an increase in the calcination of NiFe2O4- KFeO2 nanocomposite magnetic films. The formation of the spinel structure of the film was strengthened using Fourier transform infrared and XRD results. The optical parameters of the nanomagnetic films were calculated from the measured transmittance and reflectance. The variation of calculated parameters with the variation of wavelength or the energy was discussed. The effect of calcination temperature on the optical parameters was also studied. The saturation magnetization increased from 15.2 to 32.31 emu g(-1) as the sintering temperature changes from 300 degrees C to 600 degrees C. (C) 2021 The Electrochemical Society (ECS). Published on behalf of ECS by IOP Publishing Limited.

Automated summary

In this study, NiFe2O4-KFeO2 nanocomposite thin films were synthesized without surfactant and water (WOSW) sol-gel route and characterized for their structural, optical, and magnetic properties. It was found that with the increase in calcination temperature, the size and surface area of the particles increased, and the saturation magnetization also increased.