On magnetic relaxation equation for anisotropic reacting fluid mixtures

In some previous papers a linear theory for magnetic relaxation phenomena in magnetizable continuous media was developed, that is based on thermodynamics of irreversible processes with internal variables. Here, we consider magnetizable reacting fluid mixtures, where irreversible microscopic phenomena give rise to magnetic relaxation, and these phenomena are described splitting the total specific magnetization in two irreversible parts and introducing one of these partial specific magnetizations as internal variable in the thermodynamic state vector. The phenomenological equations for these fluid mixtures are derived and, in the linear case, a generalized Snoek equation for magnetic relaxation phenomena is worked out and particular cases are treated. The obtained results have applications in several fields of applied sciences, as, for instance, in nuclear magnetic resonance and in medicine, where complex fluids are taken into consideration.