Material design for transparent ferromagnets with ZnO-based magnetic semiconductors

Ferromagnetism of ZnO-based magnetic semiconductors was investigated by ab initio calculations based on the local density approximation, In a system o f Mn atom doped ZnO, the ferromagnetic ordering of Mn magnetic moments was induced by hole doping. It was also found that 3d transition metal atoms of V, Cr, Fe, Co and Ni showed the ferromagnetic ordering of their magnetic m oments in ZnO without any additional carrier doping treatments. Appearance of the ferromagnetism in these systems suggests possibility for a fabricati on of a transparent ferromagnet which will have great impact an industrial applications in magneto optical devices.