Abstract
In this study, double perovskite oxide Sr2FeMoO6 doped with Nd was prepared through sol–gel method. SNFMO belongs to the I4/m space group. The Fe/Mo order of SNFMO obtained from Rietveld refinement are 89.3%, 88.6%, and 88.2% for x = 0.01, 0.03, and 0.05, respectively. For SNFMO (x = 0.01, 0.03, 0.05) samples, the values of Fe3+/Fe2+ ratio are 1.41, 1.51, and 1.53, and the values of Mo5+/Mo6+ ratio are 0.37, 0.48, and 0.54. According to the minimum dM/dT of the FC curves, the Curie temperatures of SNFMO are 378, 367, and 380 K for x = 0.01, 0.03, and 0.05, respectively. H/M-M2 curve analyses showed that all the samples have a second-order magnetic transition. In the magnetic field of 2.5 T, the maximum ΔSM of SNFMO (x = 0.01, 0.03, 0.05) samples were 0.36, 0.63, and 1.23 J kg−1 K−1, respectively.
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