Studying the Magnetocaloric Effect in Nd0.55Sr0.45MnO3 Manganite by the Mean-field Model
| Autor: | Mohamed Hsini, Salha Khadhraoui, Nawel Khedmi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Physics Phase transition Condensed matter physics Condensed Matter Physics Manganite 01 natural sciences Electronic Optical and Magnetic Materials Entropy (classical thermodynamics) Ferromagnetism Mean field theory Total angular momentum quantum number 0103 physical sciences Magnetic refrigeration Condensed Matter::Strongly Correlated Electrons 010306 general physics Scaling |
| Zdroj: | Journal of Superconductivity and Novel Magnetism. 34:1495-1498 |
| ISSN: | 1557-1947 1557-1939 |
| Popis: | In this paper, we exploited the mean field model to simulate the magnetocaloric effect (MCE) in Nd0.55Sr0.45MnO3 manganite which undergoes second-order ferromagnetic (FM)-paramagnetic (PM) phase transition. A scaling method, based on mean field theory, leads to a direct estimation of the exchange parameter (λ), the saturation magnetization (M0), the total angular momentum (J) and the gyromagnetic factor (g) of Nd0.55Sr0.45MnO3 sample. These parameters were used for simulating the magnetic isotherms, M (H, T), and the magnetic entropy change, −∆SM(T). The theoretical calculations are compared with the experimental behavior. |
| Databáze: | OpenAIRE |
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