Abstract
We report on the structural, magnetic and magnetocaloric properties of manganite La0.67Ba0.33-xZnxMnO3 (x = 0.15 and 0.2). X-ray diffraction studies show that all samples crystallize with the rhombohedral symmetry within the space R (3) over barc: The magnetic and magnetocaloric properties of polycrystalline perovskite were investigated from the measured magnetization data of the samples as a function of the applied magnetic field. The associated magnetic entropy change close to their respective Curie temperature T-C and the relative cooling power (RCP) have been determined. It was found that the maximum change in magnetic entropy of La0.67Ba0.33-xZnxMnO3 samples reached 3.4 J/kg K at T-C = 260 K for a magnetic field of 5 T and RCP = 223.77 J/kg. In view of these results, La0.67Ba0.33-xZnxMnO3 compounds are potential candidates for magnetic refrigeration.