A threshold of Vo+/Vo++ to room temperature ferromagnetism of hydrogenated Mn doped ZnO nanoparticles

Hydrogenated Mn doped Zn1-xMnxO (x = 0.03, 0.04, 0.08) nanoparticles were prepared by co-precipitation method. With the increase of Mn ions concentration, the magnetization of the hydrogenated Zn1-xMnxO increased. Photoluminescence spectra of samples annealed in Ar and H-2 respectively were performed and the visible bands were fitted with Gaussian analysis. It is concluded that the sharp magnetization enhancement could be attributed to the long-rang interaction between bound-magnetic-polarons led by the singly charged oxygen vacancy (Vo(+)). (C) 2011 Elsevier B.V. All rights reserved.