Modification of the field dependence and scaling of the magnetocaloric effect in LaFeSi across the tricritical point

The most straightforward classification of magnetocaloric materials is according to the order of the phase transition that they undergo: either second order (continuous) phase transitions (SOPT), like Gd, or first order magneto-structural phase transitions (FOPT) like the giant magnetocaloric material Gd
₅
Si
₂
Ge
₂
.