Abstract
In this research paper, we are basically interested in the theoretical investigation of magnetic and magnetocaloric properties of CoFeCuO4 spinel ferrite. Our sample was prepared using the sol-gel method. The XRD analysis confirmed the cubic spinel structure with the Fd3¯m space group exhibited by our compound. Furthermore, the positive slope detected in the Arrott plots is indicative of the second-order phase transition. Based on the phenomenological model of Hamad, the simulation of the magnetization M (T) goes in good agreement with the experimental results. Moreover, the magnetic entropy change (-ΔSM) estimations by Hamad’s model and Landau theory go in good accordance with the experimental results determined using Maxwell relations above the Curie-temperature TC, and they show a divergence below this temperature. The relative cooling power (RCP) has a value of 64.342 J.kg-1under a magnetic field of 5T, which is suggestive that our compound can be a promising material for the magnetic refrigeration (MR) application. Finally, the validity of the mean-field theory to the theoretical study was proven through the compatibility inferred between the (-ΔSMmax) and RCP values obtained by the Maxwell relation and the Bean-Rodbell model.
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