Point defects aspect of magnetite nano particles as studied by Mossbauer spectroscopy

Mossbauer spectroscopy measurements have been carried out in nano particles of Fe3O4 to understand in a detailed manner about the point defects that are present and compared with the results of the bulk magnetite. Mossbauer measurements have been carried out in the as formed magnetite nano particles and subsequent to annealing in vacuum at different temperatures. The present study elucidates the implication of point defects on the local structural and magnetic properties of magnetites in terms of deduction of hyperfine parameters of Fe ions such as valence, quadrupole splitting and magnetic hyperfine field.