The influence of quadrupolar interaction on the magnetocaloric effect in PrMg2

We report the magnetocaloric properties, the isothermic entropy change and adiabatic temperature change, in the PrMg2. This compound was fully investigated using a model Hamiltonian which includes the exchange magnetic interaction, the crystalline electrical field anisotropy and the quadrupolar interaction. All theoretical results were obtained using the proper model parameters, found in the literature. The quadrupolar interaction strong influences the lowest doublet crystal field level, Γ3 changing the order of magnetic phase transition. The magnetocaloric properties were systematic studied in term of the model parameters.