Ferromagnetic resonance and magnetic force microscopy evidence for above room temperature ferromagnetism in Mn doped Si made by a solid state sintering process

Abstract

Silicon doped with manganese made by a solid state sintering process starting with nanoparticles of Si and MnO is shown to be ferromagnetic above room temperature. The evidence for ferromagnetism is obtained from ferromagnetic resonance and magnetic force microscopy measurements. The magnetic force microscopy measurements show that the ferromagnetic resonance occurs in nanosized regions in the sample as has been suggested by Dietl. Raman and electric force microscopy measurements also suggest that then material is doped inhomogenously.