Magnetic properties of nanocomposites of mixed oxides of iron and chromium synthesized under different oxidative environments

Synthesis of nanocomposites of mixed oxides of Fe and Cr in a copolymer matrix of aniline and formaldehyde at room temperature along with IR, XRD and⁵⁷Fe Mössbauer studies on as synthesized as well as the samples on heating at different temperatures is described. The XRD and⁵⁷Fe Mössbauer studies show the formation of nanosized iron oxide particles. These studies further show the formation of nanosized particles of metal oxides and formation of solid solution of iron and chromium oxide on heating the samples at 700°C. Further, the IR studies show that the polymeric backbone is strongly influenced by different reaction conditions and lead to variable magnetic character in the heated samples as shown by their Mössbauer studies.