Abstract
In the present work, we analyze the magnetic transition and magnetic entropy change $ \vert\Delta S_{M}\vert$ of Pr0.6Sr0.4Mn1-x Fe x O3 samples. Using Arrott plots, we report that the phase transition for Pr0.6Sr0.4MnO3 sample is of second order, while the Pr0.6Sr0.4Mn0.9Fe0.1O3 sample exhibits a first-order magnetic phase transition. From the magnetization measurements at temperature close to the Curie temperature, the magnetic entropy change, $ \vert\Delta S_{M}\vert$ and the Relative Cooling Power (RCP) have been estimated. The maximum of magnetic entropy change $ \vert\Delta S_M^{\max}\vert$ reaches, under an applied magnetic field of 5T, 3.58 and 3.66J/kg K for Pr0.6Sr0.4MnO3 and Pr0.6Sr0.4Mn0.9Fe0.1O3, respectively. The RCP values have been estimated to 159.37 and 223.52J/kg. For both samples, the $ \vert\Delta S_{M}\vert$ values evaluated using the Maxwell theory were found in accordance with those calculated by the Landau theory.
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