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Theoretical study of the magnetic and magnetocaloric properties of La$_{0.7}$Sr$_{0.3}$Mn$_{0.95}$Fe$_{0.05}$O$_3$ perovskite manganites at low and high applied magnetic fields: Landau theory and phenomenological models
ASME BRAHIMI ABDELKRIM ELHASNAÏNE MERAD MOHAMED ELLOUZE MOHAMMED BENALI KANOUN
Volume 45 Published: 1 June 2022 Article ID 0098
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Keywords
Perovskite manganites ;magnetocaloric effect ;Landau theory ;phenomenological models. -
Abstract
In this study, the magnetic and magnetocaloric properties of a recently elaborated La$_{0.7}$Sr$_{0.3}$Mn$_{0.95}$Fe$_{0.05}$O$_3$ perovskite manganites have been modelled using different theoretical methods based on Landau theory and phenomenological models. The calculations were done by exploring the measurement data of magnetization vs. temperature at various low and high magnetic field values. The results confirmed that this compound has a magnetic phase transition of the second-order type from ferromagnetic to paramagnetic states at Curie temperature near the room temperature. The theoretical values of the magnetic entropy change (-${\Delta}$S$_M$) are estimated in low and high applied magnetic fields from these methods. The analysis of our obtained results of the relative cooling power indicated that this compound is a potential candidate material for magnetic refrigeration technology.
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Author Affiliations
ASME BRAHIMI1 2 ABDELKRIM ELHASNAÏNE MERAD2 MOHAMED ELLOUZE3 MOHAMMED BENALI KANOUN4
- Automatic Laboratory, A. Belkaid University, Box 119, 13000 Tlemcen, Algeria
- Solid State Physics Team, Theoretical Physics Laboratory, Faculty of Sciences, A. Belkaı¨d University, Box 119, 13000 Tlemcen, Algeria
- Faculty of Sciences of Sfax, LMEEM, Sfax University, B.P. 1171, 3000 Sfax, Tunisia
- Department of Physics, College of Science, King Faisal University, P.O. Box 400, Al-Ahsa 31982, Saudi Arabia
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Dates
- Published
- 1 June 2022
- Manuscript received
- 29 October 2021
- Accepted
- 17 January 2022
- Final version published online
- 1 June 2022
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Bulletin of Materials Science
Volume 46, 2023
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