Modelling the magnetocaloric effect arising from critical behavior of Tb2Rh3Ge rare-earth

In this paper, we investigated the critical behavior during the transition from the ferromagnetic to paramagnetic phase in Tb2Rh3Ge rare-earth. Utilizing the Landau theory, we produced isothermal magnetization curves, M(H,T), in the vicinity of the ferromagnetic-to-paramagnetic phase transition. Through an iterative program utilizing the Kouvel-Fisher method, we determined the optimized critical exponents to be: γ=1.003; β=0.348. These critical exponents are clear and reasonably consistent, although they do not align with the conventional universality classes. We have successfully simulated the magnetic entropy change curves by combining the Arrott-Noakes equation with the Landau model.