2. Magnetocaloric effects and materials

In this chapter, we introduce the magnetocaloric effect through a thermodynamic description. Next, methods for characterizing the parameters describing a magnetocaloric material are briefly introduced. Finally, we review the state of the art of materials available on an industrial or laboratory scale, comparing two key parameters ΔS _iso and ΔT _adia for field variations around 1 Tesla.

2.1 Magnetocaloric effect

The magnetocaloric effect manifests itself as a reversible thermal response (i.e. variation in temperature/entropy) of a material due to the action of a magnetic field. In a very simplified way, a magnetic material can be represented as a crystalline lattice with...

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