Low temperature Mossbauer spectroscopic studies on Sm3+ doped Zn-Mn ferrites

For the first time, we report on the low temperature Mossbauer spectroscopic study of Zn0.52+Mn0.52+Smx3+ Fe-2(3+) xO(4) ( where x = 0.01-0.05) prepared by the modified solution combustion method using a mixture of urea and glucose as a fuel. The Mossbauer spectroscopy at room and low temperatures was applied to understand the magnetic properties of the samples. The room temperature Mossbauer spectroscopy results suggest that the occupation of the octahedral sites by Sm3+ ions leads to the distortion enhancement of Fe-57 nuclei environments, which leads to an increase in quadrupole splitting Delta values of D2 and D3 doublets. The low temperature Mossbauer spectroscopy results indicate that the presence of Sm3+ ions in the octahedron sites causes the decrease in the number of Fe-O-Fe chains. The transformation of Mossbauer spectra doublets into Zeeman sextets is accompanied by a significant decrease in the magnitude IM of Mossbauer spectra intensity within the 0-1.2 mm/s velocity range normalized to its value at 300 K. This drop in the temperature dependence of IM allows one to obtain the magnetic phase transition temperature T-M from the Mossbauer experiment. (C) 2017 Elsevier B.V. All rights reserved.