Following curve related to Co0.6Mn0.4Fe2O4 Magnetic nanoparticles with extra phase a-Fe2O3. I will appreciate to help me to interpretation this spectroscopy, especially the blue line.
It is not easy to interpret a Mossbauer fit without detailed information, but it appears that your Mössbauer spectrum was fitted using a hyperfine field distribution (blue line) - this field distribution may be associated with the nanostructured phase of your sample. The better defined sextets should be related to the extra-phase.