Role of conduction electrons in mediating exchange interactions in Mn-based Heusler alloys
Role of conduction electrons in mediating exchange interactions in Mn-based Heusler alloys
Because of the large spatial separation of the Mn atoms in Heusler alloys $({d}_{\mathrm{Mn}\text{\ensuremath{-}}\mathrm{Mn}}>4\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}})$, the $\mathrm{Mn}\phantom{\rule{0.2em}{0ex}}3d$ states belonging to different atoms do not overlap considerably. Therefore, an indirect exchange interaction between Mn atoms should play a crucial role in the ferromagnetism of the systems. To study the nature of the …