Influence of zinc substitution on structural, elastic, magnetic and optical properties of cobalt chromium ferrites

Abstract

The polycrystalline Co1−xZnxCr0.5Fe1.5O4 series with (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0) has been synthesized by conventional ceramic rout method. The structural and elastic properties have been investigated by X-ray diffractometer and Fourier transform spectroscopy. Both XRD and FTIR confirm the formation of single phase cubic spinel ferrites. The cationic distribution for all samples has been proposed. The lattice parameter, X-ray density, hoping length, bond length, and packing factors–in accompaniment with variations in the zinc concentration–have been studied. The IR band position has been explained by the cations involved in the structure. The elastic moduli such as Young's modulus, bulk modulus, rigidity modulus and Poison's ratio have bee calculated using force constants. Scanning electron microscope (SEM) observation conveys information about the agglomeration of particles. The hysteresis curve obtained from vibrating sample magneto meter (VSM) conveys information about the soft nature of prepared compositions. The saturation magnetization decreases with addition of zinc ions and coercivity is almost zero. An increase in band gap energy has been observed with addition of zinc by Ultraviolet Visible Spectroscopy (UV-VIS), which is due to small crystallite size.

Evaluation of synergistic approach of spinel cadmium–copper nanoferrites as magnetic catalysts for promoting wastewater decontamination: Impact of Ag ions doping

“…Normal spinel ferrite CdFe 2 O 4 is technically important and suitable for electrical switches (Nagarajan and Thayumanavan 2018 ; Sagadevan et al 2017 ; Anjum et al 2020 ; Mahmoud and Abd-Elrahman 2012 ; Yu et al 2018 ). Cu 2+ and Ag + ions were often selected among various dopants (Mahmoud and Abd-Elrahman 2012 ; Jauhar et al 2014 ).…”

“…Many silver compounds have been widely used in a variety of reactions, including isomerization, oxidation, catalytic, biological, optical, and photocatalytic reactions (Hosseini et al 2016 ). Silver-doped ferrite thin films have been investigated and discovered that as the Ag + content increased, the saturation magnetization dropped (Zeehan et al 2019 ). Silver-doped ferrite compounds such as silver-doped cobalt ferrite (Mahajan et al 2019 ), silver magnetite nanocomposite (Jalali et al 2017 ), Ag–Cu ferrite nanoparticles (Gomes et al 2018 ), and silver ferrite–graphene nanocomposites (Hosseini et al 2016 ) exhibited antibacterial activity against gram-positive and gram-negative strains.…”