Abstract
In this paper, we report on the structural, magnetic and magnetocaloric properties of a series of nanocrystallines La0.6Sr0.4Mn1−x Al x O3 (0 ≤ x ≤ 0.2) which were prepared by the sol–gel method. The X-ray powder diffraction showed that all our synthesized samples were of a single phase and have crystallized in the hexagonal symmetry with \( {\text{R}}\bar{3}{\text{c}} \) space group. Magnetic measurements showed that the sample exhibits a ferromagnetic-to-paramagnetic phase transition at a Curie temperature close to 206 K. The maximum value of the magnetic entropy change \( \left| {\Delta S_{\text{M}}^{ \hbox{max} } } \right| \) was found to be 1.09 J kg−1 K−1 for an applied magnetic field of 5T. At this value of magnetic field, the relative cooling power was 141 J kg−1. Our result on magnetocaloric properties suggests that La0.6Sr0.4Mn1−x Al x O3 nanopowder with (0 ≤ x ≤ 0.2) is attractive as a potential refrigerant for high-temperature magnetic refrigeration.
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Elhamza, A., Rhouma, F.I.H., Dhahri, J. et al. Crystal structure, magnetic and magnetocaloric properties of aluminum-doped La0.6Sr0.4MnO3 perovskites. Appl. Phys. A 123, 358 (2017). https://doi.org/10.1007/s00339-016-0697-0
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DOI: https://doi.org/10.1007/s00339-016-0697-0