Abstract
In this work, the manganite's magnetocaloric properties are studied by changing their chemical composition for a group La0.8-xSmxSr0.2MnO3 (x = 0.0, 0.05, 0.10, and 0.15) ceramic synthesized by the solid-state reaction method. According to the X-ray powder diffraction (XRD) analysis, no sign of a secondary phase is detected. It is found that the prepared samples are formed in the rhombohedral crystal structure with an R-3c space group. There is a decreasing trend in the unit cell volume, which indicates the gradual replacement of Sm in La sites. The results obtained from the energy-dispersive X-ray (EDAX) spectroscopy test indicated that the ratio of elements in the compounds is close to their nominal values. Based on the M measurements (upon the change of temperature) of the as-prepared specimens, an FM transition is observed. The transition temperature decreases upon the increase of the x value. The measured magnetic entropies of all the La0.8-xSmxSr0.2MnO3 samples are an illustration of a magnetocaloric impact on these compounds. This observation introduces La0.8-xSmxSr0.2MnO3 as a potential candidate for applications related to magnetic refrigeration.
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