Abstract
NiFe2−xCexO4 (x = 0–0.03) nanoribbons have been successfully fabricated using electrospinning technique and followed by calcining in air at 500°C. The crystalline, morphologies and compositions of NiFe2−xCexO4 nanoribbons are characterized by X-ray diffraction, selected area electron diffraction, transmission electron microscope, field emission scanning electron microscopy and energy dispersive X-ray spectroscopy (EDX). The results show that the components, mean crystallite sizes and morphologies change along with the content of Ce3+. A formation mechanism of NiFe2-xCexO4 nanoribbons is proposed. The magnetic hysteresis loops of NiFe2−xCexO4 nanoribbons reveals that the coercivity changes from 165Oe to 64Oe and saturation magnetizations change from 40.97emu/g to 25.05emu/g at room temperature. Morevover, the Mössbauer spectra of 57Fe in NiFe2−xCexO4 nanoribbons is discussed in detail. It is believed that this work will play important role in magnetic application with the advantage of excellent magnetic properties, efficient functionalization and relatively low cost.
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