Effect of Mn-doping on the growth mechanism and electromagnetic properties of chrysanthemum-like ZnO nanowire clusters

Chrysanthemum-like ZnO nanowire clusters with different Mn-doping concentrations are prepared by a hydrothermal process. The microstructnre, morphology and electromagnetic properties are characterized by x-ray diffractometer high-resolution transmission electron microscopy （HRTEM）, a field emission environment scanning electron microscope （FEESEM） and a microwave vector network analyser respectively. The experimental results indicate that the as- prepared products are Mn-doped ZnO single crystalline with a hexagonal wurtzite structure, that the growth habit changes due to Mn-doping and that a good magnetic loss property is found in the Mn-doped ZnO products, and the average magnetic loss tangent tandm is up to 0.170099 for 3% Mn-doping, while the dielectric loss tangent tande is weakened, owing to the fact that ions Mn2＋ enter the crystal lattice of ZnO.