Abstract
The Co2Y-type barium hexaferrite Ba2−2xCrxNixCo2Fe12O22 (x = 0.0, 0.1, 0.15) was synthesized using the sol–gel auto-combustion technique. The formation phase of the Y-type hexaferrites was observed using X-ray diffraction (XRD) analysis. Fourier-transform infrared (FTIR) analysis confirms the formation of Y-type hexaferrites. Field-emission scanning electron microscopy (FESEM) reveals particles with hexagonal plate-like morphologies. The optical band gap of the prepared samples lies between 0.74 and 2.16 eV. The coercivity values of the prepared samples demonstrate their soft-magnetic nature. Dielectric analyses show the influence of the dopant ions on the dielectric parameters of the prepared samples. Impedance spectroscopy using a Nyquist plot shows that most of the dielectric response results from grain-boundary contributions.
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