Structural, optical, dielectric and magnetic properties of Ce-doped strontium hexaferrite synthesized by a hydrothermal process

• Published in: Journal of materials science. Materials in electronics 2019-09, Vol.30 (18), p.17374-17381
• Main Authors: Banihashemi, V., Ghazi, M. E., Izadifard, M.
• Format: Article
• Language: English
• Subjects: Cerium oxides; Characterization and Evaluation of Materials; Chemistry and Materials Science; Dependence; Dielectric properties; Diffraction patterns; Energy gap; Field emission microscopy; Fourier transforms; Hysteresis loops; Magnetic properties; Magnetic saturation; Materials Science; Nanoparticles; Optical and Electronic Materials; Optical properties; Phase transitions; Platelets; Rietveld method; Spectrum analysis; Synthesis
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-019-02086-2

Samples of Sr 1−x Ce x Fe 12 O 19 (x = 0.0, 0.05, 0.1, and 0.15) were synthesized by a hydrothermal process. The X-ray diffraction patterns and the Rietveld refinement method confirmed the formation of the pure nano-crystalline phase of the M-type hexaferrite for all samples, except for the x = 0.15 sample with a small CeO 2 phase. Fourier transform-infrared spectroscopy measurements showed the formation of the M-type hexaferrite. Field emission-scanning electron microscopy revealed that the prepared samples were nanoparticles that agglomerated in irregular platelets. The hysteresis loops (M–H) measured at room temperature indicated a decrease in the saturation magnetization with an increase in the Ce content. The band gap dependency on the Ce content was also studied using the UV–Vis spectra, which showed that the band gap energies were in the range of 1.37–1.51 eV. The dielectric constant and dielectric tangent loss measurements showed that the x = 0.1 sample has higher values than others.