The search for new spintronic materials: half-metallic antiferromagnets and diluted magnetic semiconductors

Based on the electronic structure studies, we propose that the double perovskite LaV O₃/ARuO₃ superlattice (A = Ca,Sr and Ba) and thiospinel Mn(CrV)S₄ and Fe_0.5Cu_0.5(V_0.5Ti_1.5)S₄ are potential candidates for half-metallic antiferromagnets (HM-AFMs). We have also explored the effect of the Li intercalation on the electronic and magnetic properties of transition-metal (TM) doped anatase TiO₂. We propose a potential spintronic and electrochromic device made of Li intercalated Mn-doped TiO₂, which is controlled by the electric field. For (Fe, Cu) co-doped ZnO, the charge transfer between Fe and Cu leads to ferromagnetism via a type of the double-exchange mechanism.