Microstructural, magnetic and electric properties of mixed Cs–Zn ferrites prepared by solution combustion method

Nanosized zinc substituted ferrites with composition Cs0.5-x/2ZnxMn0.05Fe2.45-x/2O4 (x = 0–0.5) were prepared by solution combustion route. The ferrites obtained have been characterized by powder XRD, Mössbauer spectroscopy and Transmission Electron Microscope (TEM). Magnetic and electrical properties have also been studied. Powder X-ray diffraction analysis shows the formation of single phase cubic spinel structure. The saturation magnetization (Ms) initially exhibits an upward trend followed by a regular decrease with increasing diamagnetic Zn content. Curie temperature shows a downward trend with Zn content. The Mössbauer spectra display transition from ferrimagnetic to super-paramagnetic phase with increasing ‘x  ’ value. The temperature dependence resistivity shows regular decrease with temperature reflecting semiconductor behaviour of the ferrite samples. The permittivity (ɛ′) and tangent loss (tan δ) measured at room temperature as a function of frequency shows the expected ferrite behaviour. TEM studies indicate the formation of nanosized ferrite particles. These results demonstrate promising features of Cs–Zn ferrites in microwave applications.

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► Solution combustion method used results in pure and nano ferrites particles.
► Lattice parameter shows regular increase with zinc content.
►  Superior magnetic/electrical properties make them fit for high-frequency applications.