The study of Heusler and half-Heusler compounds are of scientific interest because their

highly tunable properties make them a potential platform for next generation devices

including magnetic memory, and refrigeration. Previous studies have reported MnCuSb

as the only antiferromagnetic half-Heusler, however, there is still a great deal of

uncertainty surrounding the exact nature of the magnetic ground state. This work uses

density functional theory (DFf) calculations to understand the relationship between the

crystal structure of MnCuSb and its resulting magnetic order. A series of calculations

were performed using the Vienna Ab-initio Simulation Package (VA SP) to predict the

ground state of MnCuSb. To gain insight into the observed antiferromagnetic order of

MnCuSb, the impact chemical order within this system has on the density of states will

be analyzed.