Investigation of structural, elastic, electronic, magnetic and optical properties for the full Heusler alloy: Co2FeGa

By using the full potential linearized augmented plane wave (FP-LAPW) method within the density functional theory (DFT). The physical properties such: structural, electronic, magnetic, optical and elastic properties for the full Heusler alloy Co2FeGa are investigated and discussed. The exchange-correlation potential was treated using two of approximations where the WC-GGA is used to calculate the stable state of the material for both Fm-3m and F43-m space groups from the FM, NM, and the AFM states by calculating all of their structural parameters from the lattice parameter a (& Aring;) to the enthalpy Delta Hf and to calculate also the elastic constants. The mBJ-GGA approximation used to calculate the electronic BS and the DOS. In last both of those approximations in addition to the GGA+U approximation are used to calculate the magnetic total (Mtot) and partial (Mco, MFe and MGa) moments. Our calculations and results are in good agreement with previous works.