Synthesis, characterization, infrared studies, and thermal analysis of Mn_(0.6)Zn_(0.4)Fe_2(C_4H_2O _4)_3·6N_2H_4 and its decomposition product Mn_(0.6)Zn_(0.4)Fe_2O _4

摘要

Manganese zinc ferrous fumarato-hydrazinate precursor, Mn _(0.6)Zn_(0.4)Fe_2(C_4H_2O _4)_3·6N_2H_4 was synthesized for the first time and characterized by chemical analysis, infrared spectral studies, and thermal analysis. Infrared studies show band at 977 cm~(-1) indicating bidentate bridging nature of the hydrazine in the complex. Thermogravimetric (TG) studies show two steps dehydrazination followed by two steps total decarboxylation. The precursor on touching with burning splinter undergoes self propagating autocatalytic decomposition yielding ultrafine Mn_(0.6)Zn_(0.4)Fe_2O_4. XRD studies confirms single phase formation as well as nanosize nature of "as prepared" Mn_(0.6)Zn_(0.4)Fe_2O_4. The saturation magnetization of the "as prepared" Mn_(0.6)Zn _(0.4)Fe_2O_4 was found to be 31.46 emu gm ~(-1), which is lower than the reported, confirms the ultrafine nature of the oxide.