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<p>The intercalation of Cobalt (Co) into Zinc (Zn) ferrite (Fe<sub>2</sub>O<sub>4)</sub> is a contemporary composite material with significant magnetic and structural characteristics. Our study investigates the Mössbauer, structural, and magnetic properties of Co-substituted ZnFe<sub>2</sub>O<sub>4</sub>, synthesized via microwave hydrothermal method. A series of polycrystalline samples were prepared by modulating the cobalt concentration (0.1, 0.4, 0.7, and 0.9) in zinc ferrite. We discovered a profound impact on lattice parameters and magnetization. Scanning electron microscopy (SEM) shows a uniform surface morphology with an accumulation of particles, including particle clustering. The X-ray diffraction (XRD) data confirm the single-phase cubic spinal structure. No additional impurities or subordinate phases were detected. UV-visible spectra show a slight shift in Co-doped ZnFe<sub>2</sub>O<sub>4</sub> samples (2.60eV to 2.30eV) in optical bandgap with the increment of cobalt due to generating extra energy state. Fourier transform infrared (FTIR) spectroscopy&#xa0;is used to identiy&#xa0;functional group bending modes at specific wavelengths. Mössbauer spectroscopy analysis confirms the&#xa0;presence of cations that selectively inhabit a particular site of lattice, indicative of the preferential distribution of these ions within the crystal structure. Incorporating cobalt ions through doping significantly affects the material behavior, leading to changes in magnetic susceptibility, optical absorption spectra, and electrical conductivity.</p>

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Impact of cobalt doping on the properties of zinc ferrite (CoxZn1-xFe2O4)

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Muhammad Numan Nawaz,
  • Uzma Ghazanfar,
  • Weifeng Yuan,
  • Hassan Wahab,
  • Osama Tariq Satti,
  • Sadaf Bashir Khan

摘要

The intercalation of Cobalt (Co) into Zinc (Zn) ferrite (Fe2O4) is a contemporary composite material with significant magnetic and structural characteristics. Our study investigates the Mössbauer, structural, and magnetic properties of Co-substituted ZnFe2O4, synthesized via microwave hydrothermal method. A series of polycrystalline samples were prepared by modulating the cobalt concentration (0.1, 0.4, 0.7, and 0.9) in zinc ferrite. We discovered a profound impact on lattice parameters and magnetization. Scanning electron microscopy (SEM) shows a uniform surface morphology with an accumulation of particles, including particle clustering. The X-ray diffraction (XRD) data confirm the single-phase cubic spinal structure. No additional impurities or subordinate phases were detected. UV-visible spectra show a slight shift in Co-doped ZnFe2O4 samples (2.60eV to 2.30eV) in optical bandgap with the increment of cobalt due to generating extra energy state. Fourier transform infrared (FTIR) spectroscopy is used to identiy functional group bending modes at specific wavelengths. Mössbauer spectroscopy analysis confirms the presence of cations that selectively inhabit a particular site of lattice, indicative of the preferential distribution of these ions within the crystal structure. Incorporating cobalt ions through doping significantly affects the material behavior, leading to changes in magnetic susceptibility, optical absorption spectra, and electrical conductivity.