Critical behaviour and magnetocaloric effect simulation in Tb2Rh3Ge

In this article, we have studied the critical behaviour at the ferromagnetic-paramagnetic phase transition in Tb2Rh3Ge alloy. By exploiting the Landau theory, isothermal magnetization M(H, T) curves near the ferromagnetic-paramagnetic phase transition have been generated. The optimized critical exponents, through an iterative program based on the Kouvel-Fisher method, were found to be as: gamma=1.003; gamma=0.348. These critical exponents are unambiguous and reasonable, but they do not match with the conventional universal classes. Based on the combination of the Arrott-Noakes equation and the Landau model, the magnetic entropy change curves have been successfully simulated.

Automated summary

In this article, we studied the critical behavior at the ferromagnetic-paramagnetic phase transition in Tb2Rh3Ge alloy and generated the corresponding magnetization curves using Landau theory. The optimized critical exponents were found using the Kouvel-Fisher method and successfully simulated the magnetic entropy change curves.