Abstract
The GaN:Mn nanostructure was prepared using direct current (DC) arc discharge plasma method. No catalysts or templates are involved in the experiment. The test of energy dispersive x-ray spectroscopy (EDXS) detected the signals of Ga, N, Mn, and the Mn signal strength is slightly stronger with the increasing Mn content. The X-ray diffraction peak (XRD) is sharp, and there is a clear XRD peak shift towards larger angle with the increase of doping concentration. It is indicated that GaN:Mn nanoparticles have good crystallinity, and the introduced Mn has changed the lattice parameter. Photoluminescence (PL) shows that the absorption of visible light is a relatively broad range. The Mn doped induced the energy levels in the band gap, leading to the increasing of yield of electron-hole pair, and the optical property enhanced with the increasing of Mn concentration. Meanwhile the complicated magnetic transition has been found due to the quantum tunneling of magnetization. The magnetism is from the doped Mn, and its concentration impacts the strength of magnetic coupling.
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