Kinetic behavior in specimens initially cooled through the ordering range is studied as a function of subsequent prolonged isothermal heat treatments. Room temperature measurement of electrical resistivity and saturation induction give evidence substantiating existence of ordered domains. Anomalous kinetic behavior at intermediate ordering temperatures is interpreted as due to growth of antiphase nuclei. Equilibrium values attainable at low ordering temperatures and multi‐valued correspondence between resistivity and magnetic data exhibit dependence upon extent of domain growth.