Magnetic properties of (Zn, Mn)Se and effect of carrier doping

摘要

Zn_xMn_1-_xSe is II-VI diiluted magnetic semiconcutor. We have studied electronic structure of Zn_(0.5)Mn_(0.5)Se and magnetic properties and the effect of carrier doping by using band calculation (FLAPW method) in order to relaize higher ferromagnetic transition up to room temperature. We concluded that ferromagnetic state is unstable up to higher carrier doping state in Zn_(0.5)Mn_(0.5)Se. The freeomagnetic state instability is explained that the anti-ferromagnetic super-exchange interaction is strong because of strong hybridization between Mn-3d orbitals and Se-4p orbitals.