Theoretical Insights into the Stability of Perovskite Clusters by Studying Magnetization and Magnetocaloric Effect of Nd0.6Sr0.4MnO3 Compound at Room Temperature

Abstract

The Nd0.6Sr0.4MnO3 sample has been synthesized by the solid-state reaction. In this research paper, structural, morphological, magnetic and magnetocaloric properties are reported. The refinement by Fullprof has revealed the coexistence of both Pnma orthorhombic and R-3c rhombohedral phases. The obtained magnetic results show a paramagnetic–ferromagnetic transition at TC = 245 K. The magnetocaloric effect was estimated from the magnetic isotherms. We can estimate that the magnetic entropy change (ΔS) values by the Hamad theory are very close to those obtained using the classical Maxwell relation. Under an applied field 5 T, the maximum of the magnetic entropy change (ΔS) max and the relative cooling power is found to be 3.68 J/kg K and 216.03 J/kg, respectively. The obtained values are compared with those of some other reported manganite and show that our compound could be a promising candidate for magnetic refrigeration. Finally, the construction of the universal curve of the magnetic entropy change confirmed the studied manganite undergoes a second-order magnetic phase transition.

Impact of synthesis route on structural, magnetic, magnetocaloric and critical behavior of Nd0.6Sr0.4MnO3manganite

“…To further estimate the efficacy of our compounds in the magnetic cooling systems, the calculated DS max M and the RCP values found in the present study are compared with that of other magnetic materials 26,29,30,[76][77][78][79] and tabulated in Table 3. Fig.…”

“…[25][26][27] Neodymium-based manganites seem to be very promising magnetocaloric candidates 28,29 owing to the reason that the magnitude of their magnetic entropy change and the value of their transition temperature can be strongly tuned by controlling their microstructure and their chemical composition following the preparation method. 30 As the magnetocaloric properties of manganites were examined only to a limited extent, the exploration of other systems and new elaboration process inducing an improvement in the magnetocaloric effect is still under the initial stage. 31,32 Different methods, such as solid state reaction, [33][34][35][36] chemical coprecipitation, [37][38][39] and sol-gel method [40][41][42][43] are available for the synthesis of RE manganites with a perovskite-like structure.…”

“… 25–27 Neodymium-based manganites seem to be very promising magnetocaloric candidates 28,29 owing to the reason that the magnitude of their magnetic entropy change and the value of their transition temperature can be strongly tuned by controlling their microstructure and their chemical composition following the preparation method. 30 …”