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Abstract content <br> (Max 300 words)
Glycol-thermal technique was used for the synthesized MnxNi1-xFe2O4 (x = 0.1, 0.3, 0.5) nanoparticle ferrites from high-purity metal chlorides. Structure parameters and magnetic properties were investigated using X-ray powder diffraction (XRD), 57Fe Mössbauer spectroscopy, vibrating sample magnetometer (VSM) on a cryogen free measurement system. XRD results confirmed single-phase formation of the as-prepared samples with average crystallite sizes of about 8 nm having Fd3m space group. The microstrains for the as-prepared samples were relieved by increasing Mn- concentration, x, while the coercivity and lattice parameters were decreased. Temperature and magnetic field dependences as a function of magnetization for the as-prepared sample at = 0.5 in external field of up to 5 T and at isothermal temperatures ranged from 2 K to 300 K. Tiny values of coercive fields indicate superparamagnetic like-behavior of studied compounds are also investigated.
Main supervisor (name and email)<br>and his / her institution
Dr. Thomas Moyo
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