Mn-Doping Effects on Structure and Magnetic Properties of ZnO Nanoparticles
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Magnetic properties of Mn-doped ZnO nanoparticles, synthesized by the co-precipitation method, have been studied. The presence of a single crystalline phase identified as the wurtzite structure was determined by X-ray diffraction measurements in all the samples. Additional Bragg reflections associated to manganese oxides phases have been found in the 10 mol\(\%\) Mn-doped ZnO sample which are more evident after calcinating at high temperatures. Magnetization measurements reveal a paramagnetic behavior with antiferromagnetic interactions becoming weaker as the Mn concentration is increased. For the 10 mol\(\%\) Mn-doped ZnO sample the coexistence of a paramagnetic and a ferromagnetic phase has been determined. The latter phase was associated with the presence of Mn\(_3\)O\(_4\) compound which is in agreement with the structural results.
KeywordsMn-doped ZnO Co-precipitation Nanoparticles Magnetization
We would like to thank the Brazilian agencies CAPES and CNPq for providing the financial support.
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