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Structural, magnetic and magnetocaloric properties of polycrystalline La0.67Ba0.332xZnxMnO3 (x 5 0.15 and 0.2) manganites

Author name : Zaineb . . Mohamed
Publication Date : 2016-03-21
Journal Name : Applied Physics A

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 R3c: 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 TC 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 TC = 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.

Keywords

magnetocaloric properties-relative cooling power -magnetic refrigeration-magnetic entropy

Publication Link

https://doi.org/10.1007/s00339-016-9805-4

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