Controllable magnetic property of SiC by anion-cation codoping

We present that the magnetic property of SiC can be controlled by anion-cation codoping based on first-principles calculations. The anion-cation codoped SiC can be either ferromagnetic or antiferromagnetic by controlling the codoping configurations. The Ferromagnetic SiC with a high exchange energy can be achieved by nitrogen-transition metal (TM: Cr, Mn, Fe, and Co) codoping, while oxygen-TM codoped SiC is antiferromagnetic or non-magnetic, regardless of whether TM-doped SiC is ferromagnetic, antiferromagnetic, or nonmagnetic. The ferromagnetism was attributed to carrier-mediated interactions because of the coupling between the spin-polarized d and p electrons.