Modelling the Magnetocaloric Effect Arising from Critical Behavior of Tb2Rh3Ge Rare-Earth

Salha Khadhraoui; Nadia Zaidi; Hanen Hammami

doi:10.5281/zenodo.10403119

Authors

Salha Khadhraoui AL-Baha University, Faculty of Science, Department of Physics, Al Bahah, Saudi Arabia, https://orcid.org/0000-0002-1020-7094
Nadia Zaidi Jouf University, College of Sciences, Department of Physics, Aljouf, Saudi Arabia. https://orcid.org/0000-0002-7743-3328
Hanen Hammami AL-Baha University, Faculty of Science, Department of Physics, Al Bahah, Saudi Arabia https://orcid.org/0000-0003-2715-0167

DOI:

https://doi.org/10.5281/zenodo.10403119

Keywords:

Magnetizations, Critical behavior, Landau model, Spontaneous magnetization, Modified Arrot plot

Abstract

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.

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