The spinodal decomposition was studied in the aged Mn-40 at. %Cu, Mn-30 Mn-20 %Cu alloys using a phase-field model based on Cahn–Hillard equation, considering subregular solution and energy contribution of magnetic behavior. simulations were performed at aging temperatures 300, 400, 500 °C for times from 1 to 240 min. growth kinetics Mn concentration profiles with time indicated clearly that ph...