Abstract
The electronic structure of Fe-based quaternary Heusler compounds Fe2CoGa is calculated by first-principles density functional theory. Structural optimization is performed and the calculated equilibrium lattice constant is 5.812 angstrom The calculated density of states (DOS) shows the existence of energy gap of 0.13eV in the majority-spin channel. The calculations reveals that this material exhibit 100% spin-polarization. The value of magnetic moment is 5.72 square B which is quite high. These results show that Fe2CoGa is a good choice for spintronic devices.