article · Journal of Superconductivity and Novel Magnetism
In this paper, we have investigated the magnetic and magnetocaloric characteristics of a La2MnNiO6 composite, in conjunction with La2MnCoO6. This composite consists of two phases of double perovskite materials. Employing the mean-field approximation, we successfully modeled how magnetization and the change in magnetic entropy vary with temperature under different magnetic fields in our samples. This phenomenological model helped us also plot the maximum magnetic entropy change (-ΔSM)max, full width at half-maximum δTFWHM, and relative cooling power (RCP). Our analysis has revealed an optimal plateau-type magnetocaloric effect near room temperature, corresponding to a specific composition x between 0.2 and 0.5. Ultimately, this theoretical model lets us predict the magnetic and magnetocaloric behavior of composite materials, providing a foundation for future studies.
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DOI: 10.1007/s10948-024-06777-8
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