Prediction of magnetic and magnetocaloric properties in Pr0.8−xBixSr0.2MnO3 (x=0, 0.05 and 0.1) manganites - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Bulletin of Materials Science Année : 2019

Prediction of magnetic and magnetocaloric properties in Pr0.8−xBixSr0.2MnO3 (x=0, 0.05 and 0.1) manganites

Résumé

In this work, we have investigated the magnetic and magnetocaloric properties of Pr0.8−xBixSr0.2MnO3 (x=0, 0.05 and 0.1) polycrystalline manganites prepared by sol–gel route on the basis of a phenomenological model. Temperature dependence of magnetization indicates that all our samples exhibit a second order paramagnetic to ferromagnetic transition with a decrease in temperature. A correlation between experimental results and theoretical analysis based on a phenomenological model is investigated. The magnetic and magnetocaloric measurements are well simulated by this model. Under a magnetic applied field of 5 T, the theoretical absolute values of the maximum of magnetic entropy change ΔSMax are found to be equal to 5.33, 3.33 and 2.97Jkg−1K−1 for x=0, 0.05 and 0.1 respectively. The relative cooling power and the specific heat capacity values are also estimated. The predicted results permit us to conclude that our compounds may be promising candidates for magnetic refrigeration at low temperatures.
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Dates et versions

hal-02099118 , version 1 (24-08-2023)

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A Ben Jazia Kharrat, E.K. Hlil, W Boujelben. Prediction of magnetic and magnetocaloric properties in Pr0.8−xBixSr0.2MnO3 (x=0, 0.05 and 0.1) manganites. Bulletin of Materials Science, 2019, 42 (2), pp.62. ⟨10.1007/s12034-019-1739-y⟩. ⟨hal-02099118⟩

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