Structural, Morphological, Electrical and Magnetic Properties of Yttrium-Substituted Co-Zn Ferrites Synthesized by Double Sintering Technique


A series of rare earth Y3+ ion substituted Co-Zn ferrites Co0.5Zn0.5YxFe2-xO4 (x = 0.00 to 0.08 in step of 0.02) have been synthesized by conventional double sintering technique from the oxide powders of Co, Zn, Fe, and Y. The XRD, FESEM, EDS, DC resistivity, dielectric measurements, VSM, and Curie temperature (Tc) analysis have been used to investigate structural, morphological, electrical, and magnetic properties. Single phase of cubic spinel structure has been confirmed up to x < 0.06, and a small amount of secondary phase YFeO3 has also been detected for x > 0.06. The lattice parameter initially decreases than increases with yttrium concentrations. The FESEM image shows that the grains and grain boundaries are distinct and uniformly distributed and the purity has also been endorsed from the EDS spectra. The average grain size decreases at x = 0.02 and then increases with Y substitution. The long range mobility of charge carriers and presence of localized charge carriers with retreat from the Debye-like behavior in the compositions have been explored using electric modulus and impedance. The magnetic strength diminishes owing to existence of magnetic dilution in the A-B interactions subsequent to the Tc declines with the x contents. The value of saturation magnetization decreases with increasing Y3+ contents that indicates that the domain wall motion become tougher due to substitution of foreign ions Y3+ that possess larger ionic radius. Therefore, the Y3+ substituted Co0.5Zn0.5YxFe2-xO4 (x = 0.00 to 0.08 in step of 0.02) ferrites with high resistivity and low losses has implications to be used in high frequency and power supply devices applications.

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The authors are grateful to the authority of Chittagong University of Engineering and Technology (CUET) for financial support. Authors are also thankful to Materials Science Division (MSD), Atomic Energy Centre, Dhaka (AECD) and Department of Glass and Ceramics Engineering (GCE), Bangladesh University of Engineering and Technology for their laboratory support for this work.

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Das, M., Khan, M.N.I., Matin, M.A. et al. Structural, Morphological, Electrical and Magnetic Properties of Yttrium-Substituted Co-Zn Ferrites Synthesized by Double Sintering Technique. J Supercond Nov Magn 32, 3569–3577 (2019).

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  • Co-Zn ferrites
  • Rare-earth ions substitution
  • DC resistivity
  • Dielectric properties
  • Magnetic properties


  • 75.50.Bb
  • 75.50.Gg
  • 75.60.Ej
  • 75.50.Ss