Temperature dependence of interaction field distribution in nanostructured materials

In this simulations we are using two types of models, one Ising-type model and a full micromagnetic Langevin-type simulation. In order to observe the effects at different temperatures we have used a FORC diagram study which implies in each case the simulation of a set of typically 100 First-order Reversal Curves (FORC). The FORC diagram is calculated at each temperature.The Ising-type model we have developed is applied to a 2D sample with the magnetic moments two equilibrium states.we present a comparison between the results obtained with the two methods and how the temperature dependence of the magnetic properties of the samples is described by the two models. We clearly see in both cases an important change in the distribution of both coercive and interaction fields distributions. For classical longitudinal media we have used such phenomenological temperature dependences in Preisach-Neel models.