Abstract
The La0.8Na0.2Mn1-xCoxO3 (0 ≤ x ≤ 0.06) manganite are prepared by the sol gel–based Pechini route. The effect of substitution in Mn site with Co upon the structural, magnetic, and magnetocaloric properties has been analyzed by means X-ray diffraction and linear extracting magnetometer. These nanoparticles crystallize in a rhombohedral symmetry with R3-c space group without any detectable impurity phase. All prepared sample show a paramagnetic (PM) ferromagnetic (FM) phase transition near the critical temperature Tc. In fact, the experimental results confirm that Mn site substitution with Co decreases the Curie temperature Tc. Magnetocaloric results revealed large relative cooling power RCP values making our samples potential candidate for magnetic refrigeration applications. Referring to the universal data, we revealed a second-order nature of magnetic phase transition for all samples following the mean field approximation.
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Laouyenne, M.R., Baazaoui, M., Hlil, E.K. et al. Effect of Cobalt Doping on Magnetocaloric Properties of La0.8Na0.2Mn1-xCoxO3 Manganite. J Supercond Nov Magn 35, 2889–2896 (2022). https://doi.org/10.1007/s10948-022-06338-x
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DOI: https://doi.org/10.1007/s10948-022-06338-x