MAGNETOCALORIC EFFECT: THEORETICAL DESCRIPTION AND PERSPECTIVES

摘要

In this paper we present a theoretical description of the magnetocaloric effect in metallic compounds. Here, the emphasis concerns compounds whose magnetism has an itinerant character. We use a microscopic model based in the framework of the band theory and we make a review analysis of themagnetocaloric effect in terms of the model parameters. Then, we apply the model to the compound Mn(As_(0.7)Sb_(0.3)) to determine the magnetocaloric characteristics at ambient pressure and for some values under external pressure.