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• W2618109769 abstract "In this paper, we have reported in details the effect of bismuth doping on the structural, magnetic and magnetocaloric properties of the nominal composition La0.8Na0.2Mn1−xBixO3 (0 ≤ x ≤ 0.06). All the compounds were synthesized by using the conventional solid-state reaction with a final sintering temperature of 1400 °C. For the undoped compound, the X-ray refinement shows the coexistence of two phases: a major phase crystallizing in the rhombohedral structure with R-3C space group and a minor one corresponding to Mn3O4, which adopts the tetragonal symmetry with I41/amd space group. However, the doped compounds (x = 0.03 and x = 0.06) are only indexed in the rhombohedral structure with R-3C space group without the presence of any minor phase. M (T) and M (H) investigations show a single ferromagnetic-paramagnetic transition with increasing temperature. The Curie temperature values decrease gradually with Bismuth doping, 330 K for x = 0, 320 K for x = 0.03, and 310 K for x = 0.06. Moreover, a wide variation in the magnetic entropy change with respect to temperature has been noticed and it indicates a significant magnetocaloric effect. The maximums of the magnetic entropy change −ΔSM at μ0H = 5 T are 4.73 J/Kg K, 4.77 J/Kg K and 5.20 J/Kg K for x = 0, 0.03 and 0.06 at 335 K, 325 K and 315 K, respectively. The RCP values of our current compounds are 241 J Kg−1, 218 J Kg−1 and 229 J Kg−1 with negligible hysteresis losses, thus offering the opportunity to use them in the magnetic refrigeration. The master curve investigations display the collapse of the entire curves in the same plot to convey the second order transition of the compounds." @default.
• W2618109769 created "2017-06-05" @default.
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• W2618109769 date "2017-10-01" @default.
• W2618109769 modified "2023-10-14" @default.
• W2618109769 title "Enhanced magnetocaloric effect with the high tunability of bismuth in La 0.8 Na 0.2 Mn 1−x Bi x O 3 (0 ≤ x ≤ 0.06) perovskite manganites" @default.
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• W2618109769 doi "https://doi.org/10.1016/j.jallcom.2017.05.269" @default.
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