Linear and non-linear energy barriers in systems of interacting single-domain ferromagnetic particles

A comparative analysis between linear and non-linear energy barriers used for modeling statistical thermally-excited ferromagnetic systems is presented. The linear energy barrier is obtained by new symmetry considerations about the anisotropy energy and the link with the non-linear energy barrier is also presented. For a relevant analysis we compare the effects of linear and non-linear energy barriers implemented in two different models: Preisach–Néel and Ising–Metropolis. The differences between energy barriers which are reflected in different coercive field dependence of the temperature are also presented.

► The linear energy barrier is obtained from symmetry considerations. ► The linear and non-linear energy barriers are calibrated and implemented in Preisach–Néel and Ising–Metropolis models. ► The temperature and time effects of the linear and non-linear energy barriers are analyzed.