The magnetocaloric effect of a paramagnetic salt from the point of view of Tsallis thermostatistics

Abstract

In this work, we have studied the magnetocaloric effect (MCE) of a paramagnetic salt under the view of the Tsallis thermostatistics formalism. In order to model the paramagnetic salt we have used the simple two-level model. Within this model, it is possible to realize the role of the Tsallis parameter q for all thermodynamics variables calculated here, i.e. the internal energy, the specific heat, the entropy, and the magnetocaloric potential. The main result presented in this work is the relation between the total heat related to the MCE and the q-parameter of the Tsallis theory. There is a threshold value of q where, above this value, the total heat change is constant for all q while below this value, there is a quick decreasing.