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ZnO and Ni 0.2 Co 0.1 Zn 0.7 O nanoparticles were successfully synthesized by microwave assisted combustion synthesis method using urea as a fuel. The structural, morphological, compositional and Magnetic property of Ni 0.2 Co (XRD), Scanning electron microscopes (FE (EDX), and quantum design Vibrating sample magnetometre structural property showed the formation of Wurtzite structure of ZnO,with nine prominent peaks in which the strong diffraction peaks appear in (100), (002) and (101), respectively, there is a trace related to Ni ions observed. The average size of these nanoparticles was estimat which show that there is a little decrease in the average size of the particles compared to ZnO. Scanning electron microscopes (SEM) showed that the samples have sizes smaller than 100nm, no indication of phase separation and little agglomeration was o spectroscopy (EDX) results tallies with the synthesis results. Magnetic measurement at all temperature the sample present a ferromagnetic behavior with a clear S shape hysteresis loop however the behavior is dec room temperature ferromagnetic behavior was maintained.

The emergence of Dilute Magnetic Semiconductors (DMS) with a potentials for spintronic application have attracted much researches attention, special consideration has been given to ZnO semiconductor material due to its wide band gap of 3.37 eV, large exciting binding energy of 60 meV, moreover, its ferromagnetic behavior at room temperature when doped with transition metals. MxZn1-xO (M = Fe or Ni) nanoparticles were synthesized by microwave assisted synthesis method calcined at 600°C. The structural, morphological and magnetic properties of these nanoparticles were studied using X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM) and Vibrating Sample Magnetometer (VSM) respectively. Single phase Wurtzite hexagonal crystal structure was observed for the undoped and Fe doped ZnO nanoparticles with no any impurity, whereas Ni doped ZnO nanoparticles shows the formation of NiO impurities. The magnetic measurement reveals a diamagnetic behavior for the undoped ZnO meanwhile a clear room temperature ferromagnetism was observed for both Fe and Ni doped ZnO. Fe doped ZnO present a high saturation magnetization compared to Ni doped ZnO. However, Ni doped ZnO present high coercivity. The research was confirmed that Fe doped ZnO material will be good material combination for spintronic applications.

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