Evaluation of electronic and optical behavior of the interface of Co2FeAl/AlN heusler alloy

Based on the density functional theory, the electronic, optical, and structural properties of the Co _2 FeAl/AlN Interface have been studied. It is shown that the Co _2 FeAl compound is a half-metal with 100% spin polarization at the Fermi level, and the growth of this compound on the AlN semiconductor changes its stability. The best interface connection from the point of view of stability occurs in the Co-Co-Al case, which has a semi-metallic and spin polarization of the interface, which candidate it for spintronic applications. The optical properties of this interface show that it can benefit medical and sensor devices because of its anisotropic optical properties at low energies. In the infrared, visible, and ultraviolet ranges, the optical energy loss functions are zero or very little, which referred to its candidate for optical applications in these energy ranges.