Phenomenological Modeling of Magnetocaloric Properties in 0.75La0.6Ca0.4MnO3/0.25La0.6Sr0.4MnO3 Nanocomposite Manganite
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In the current research work, a phenomenological model is applied to describe the magnetocaloric effect (MCE) of the two phases 0.75 La0.6Ca0.4MnO3/0.25 La0.6Sr0.4MnO3 composite system. Based on this model, the values of the magnetocaloric properties are predicted from the calculation of magnetization as a function of temperature under different external magnetic fields. A significant MCE is obtained over a large range of temperature compared to those observed in the mother compounds, La0.6Ca0.4MnO3 and La0.6Sr0.4MnO3, making of this material considered as a promising candidate for magnetic refrigeration applications in moderate magnetic fields near room temperature. The results are then compared to those obtained experimentally in our previous work. The excellent agreement observed between both data proves the validity of the adopted model in the estimation of the MCE properties of material under investigation.
KeywordsComposite Phenomenological model Magnetocaloric effect Magnetic entropy change Relative cooling power
- 30.R. Skini, M. Khlifi, M. Triki, E. Dhahri, E.K. Hlil, J. Chem. Phys. 452, 67 (2015)Google Scholar