Calculated magnetic moment of δ-manganese

Spin-density-functional theory is used to calculate the magnetic moment of δ-Mn whose ground state is assumed to be either antiferromagnetic or ferromagnetic. The band structure is given for paramagnetic, antiferromagnetic and ferromagnetic δ-Mn. The magnetic moment of antiferromagnetic δ-Mn is found to be 3μ_B while that of ferromagnetic δ-Mn is 2.7 μ_B. The total energy favors the antiferromagnetic ground state by about 0.3 eV.