Abstract
Undoped and Ni-doped gehlenite glass microspheres were prepared by a combination of solid-state reaction followed by the flame synthesis in methane-oxygen flame. The prepared glass microspheres were characterized from the point of view of surface morphology, phase composition, and magnetic properties by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Quantum Design SQUID magnetometer. The prepared glass microspheres were X-ray amorphous. The amorphous character of glass microspheres was further verified by SEM microscopy. The undoped and Ni-doped gehlenite glass microspheres show a complex magnetic behaviour that is a function of the temperature, the magnetic field, and concentration of Ni2+ ions.
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