First order transition in MnO and the renormalization group (scaling)
Brazovskii S.A., Dzyaloshinskii I.E.
It is shown that fluctuations near the phase-transition point in MnO, CoO, NiO, etc. convert the possible second-order transition into a first-order transition. The calculations are performed within the framework of the Wilson € expansion with allowance for the real cubic symmetry of the crystal.