Magnetocaloric Effect Simulation in La0.8Na0.2MnO3-Δ Nanopowders
Creators
- 1. Al-Baha University, Faculty of Science and Arts, Physics Department, Al-Makwat, Saudi Arabia
- 2. Jouf University, College of Sciences, Department of Physics, Aljouf, Saudi Arabia
- 3. University of Monastir, Faculty of Science of Monastir, Laboratory of Physical Chemistry of Materials, Department of Physics, Monastir, Tunisia.
Description
The critical behavior of La0.8Na0.2MnO3-Δ nanopowders at the paramagnetic to ferromagnetic phase transition is studied. The optimized critical exponents, through an iterative program based on Kouvel–Fisher method, were found to be as: ; . These obtained critical exponents does not match with the conventional universality classes. In addition, these and values are close the ones predicted by the mean-filed theory ( and ). It has been approved that the estimated critical temperature and the critical exponents are unambiguous and intrinsic to the La0.8Na0.2MnO3-Δ nanopowders. Based on the combination of the Landau model and the Arrott–Noakes equation, the isothermal magnetization curves and the magnetocaloric effect have been successfully simulated.
Files
Khedmi_etal_Copyedited-Langedited_25062023.pdf
Files
(1.7 MB)
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