Synthesize CoFe2O4/SiO2 nanoparticles and investigate their magnetic, dielectric, and structural characteristics.

Jumaa, Jwan Saeed; Saeed, Salah Raza; Mohammad, Ali Mustafa

doi:10.24271/psr.2023.391586.1302

Synthesize CoFe2O4/SiO2 nanoparticles and investigate their magnetic, dielectric, and structural characteristics.

Document Type : Original Article

Authors

Jwan Saeed Jumaa ¹

Salah Raza Saeed ²

Ali Mustafa Mohammad ³

¹ Department of Physics, College of Science, Charmo University, Chamchamal, Kurdistan Region, Iraq.

² Department of Physics, College of Science, University of Sulaimani, Sulaimani, Kurdistan Region, Iraq.

³ Department of Physics, College of Education, University of Garmian, Garmian, Kurdistan Region, Iraq.

10.24271/psr.2023.391586.1302

Abstract

Abstract
Using sol-gel auto-combustion, CoFe2O4/SiO2 ferrite nanocomposites (SiO2=0, 20, 40, and 60%) were synthesized. The effect that temperature has on a material's structural, magnetic, and electrical characteristics was investigated in this study. In infrared spectroscopy and X-ray diffraction, ferrite crystallizes in the cubic spinel phase, as demonstrated by the use of patterns. Ferrite crystallite size ranges from 33.36 and 46.50 nm (depending on calcination) and 43.89 and 49.05 nm (depending on SiO2 mixing ratio). FE-SEM demonstrates that calcination temperature influences particle size, as does the amount of SiO2 in the mixture. The EDS was utilized to confirm that each sample contained all of the required elements. VSM measurements were performed on all pure and doped samples that exhibited ferromagnetic behavior at various calcination temperatures and SiO2 mixing ratios. At room temperature, the LCR meter was utilized to carry out an analysis of the electrical properties of each sample. Changes in dielectric characteristics have been discovered at frequencies between 50 Hz and 1 MHz, following the theory of Koop's, Maxwell-Wagner polarization, and hopping of electrons. As the frequency was increased observable natural behavior was evident in all of the dielectric properties.

Keywords

Keywords: nanocomposite

Spinel ferrites

VSM

Sol-gel method

Dielectric properties