Temperature dependence of the preisach function for ultrasoft nanocrystalline alloys

The determination of the decoupling temperature for the two-phase nanocrystalline alloys is usually based on the characteristic points in the evolution of the hysteresis loop parameters, such as coercive field and Br/Bs versus temperature. However, these temperature dependences are not threshold like but smeared out in a rather wide range of temperature making difficult to assess the right decoupling temperature. In this work we determine the evolution of the Preisach function below and above the decoupling temperature