Abstract
Fe-doped ZnO nanorods were synthesized by solvothermal method with Fe concentration of 2%, 5% and 10%, respectively. The morphological and structural properties of the Fe-doped ZnO nanorods were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) technique, respectively. The presence of Fe doping with different concentration was confirmed by X-ray fluorescence (XRF) spectroscopy. For largest doping concentration of Fe, the optical band gap of ZnO was found to shift considerably about 25% to lower energies than that of the pristine ZnO. Furthermore the magnetic behavior was investigated on doped and undoped ZnO samples at room temperature as well as at low temperature. We found that these nanorods do not exhibit room temperature ferromagnetism. Instead a superparamagnetic-type behavior is observed for all the concentration with the blocking temperature in the range 13-35 K.
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