Electronic structure and quantum critical behavior of NbFe$_{2}$

The C14 hexagonal Laves phase compound NbFe2 sits on the edge of a magnetic instability. By varying the composition, Nb$_{1-y}$Fe$_{2+y}$ encompasses two ferromagnetic states, a spin density wave state, and a quantum critical point (y = -0.04). Density functional calculations, using the generalized gradient approximation, found the electronic structure. An analysis of electronic structure calculations will be presented, illuminating the magnetic behavior and susceptibility at low temperature.