Ab initio study of electronic and magnetic properties of GaSb/Mn andGaAs/Mn digital ferromagnetic heterostructures

摘要

Electronic and magnetic properties of GaSb/Mn and GaAs/Mn digital heterostructureswere studied using the augmented plane wave method. The calculated electronic structures ofGaSb/Mn and GaAs/Mn are similar. A pre-edge absorption line at 6541 eV should be observed inMn K-edge x-ray absorption spectra of the heterostructures. This line can be used to study thespatial distribution of Mn in layers. The energy of exchange interaction between two Mn layers wascalculated as a function of interlayer separation. Different dependencies of the exchange energy arefound for GaSb/Mn and GaAs/Mn heterostructures.