Magnetocaloric effect and critical behavior of the La0.75Ca0.1Na0.15MnO3 compound

Souhir Bouzidi; Mohamed Hsini; Sonia Soltani; Manel Essid; M A Albedah; Hafedh Belmabrouk; J Dhahri

doi:10.1039/d3ra02443a

Magnetocaloric effect and critical behavior of the La_0.75Ca_0.1Na_0.15MnO₃ compound

RSC Adv. 2023 Jun 1;13(24):16529-16535. doi: 10.1039/d3ra02443a. eCollection 2023 May 30.

Authors

Souhir Bouzidi¹, Mohamed Hsini², Sonia Soltani³, Manel Essid⁴, M A Albedah⁵, Hafedh Belmabrouk⁵, J Dhahri¹

Affiliations

¹ Laboratoire de La Matière Condensée et des Nanosciences, Département de Physique, Faculté des Sciences de Monastir Avenue de L'Environnement Monastir 5019 Monastir Tunisia Souhirbouzidi@outlook.com.
² Laboratory of Physical Chemistry of Materials, Faculty of Science of Monastir, Department of Physics, University of Monastir 5019 Monastir Tunisia.
³ Department of Physics, College of Science and Arts, Qassim University Dariyah 58251 Saudi Arabia.
⁴ Chemistry Department, College of Science, King Khalid University (KKU) P.O. Box 9004 Abha Saudi Arabia.
⁵ Department of Physics, College of Science, Majmaah University Al Majma'ah 11952 Saudi Arabia.

Abstract

In this paper, we have studied the critical behavior and the magnetocaloric effect (MCE) simulation for the La_0.75Ca_0.1Na_0.15MnO₃ (LCNMO) compound at the second order ferromagnetic-paramagnetic phase transition. The optimized critical exponents, based on the Kouvel-Fisher method, were found to be: β = 0.48 and γ = 1. These obtained values supposed that the Mean Field Model (MFM) is the proper model to analyze adequately the MCE in the LCNMO sample. The isothermal magnetization M(H, T) and the magnetic entropy change -ΔS_M(H, T) curves were successfully simulated using three models, namely the Arrott-Noakes equation (ANE) of state, Landau theory, and MFM. The framework of the MFM allows us to estimate magnetic entropy variation in a wide temperature range within the thermodynamics of the model and without using the usual numerical integration of Maxwell relation.