An Effect of Fe3+ Ion Substitution for Cr3+ in the Octahedral Sites of FeCr2O4 Multiferroic Spinel: Mössbauer Spectroscopy Study

We present the results of a successful synthesis and investigation polycrystalline Fe2+(Cr3+, Fe3+)2O4 powder, where 1/8 part Cr3+ ions in octahedral sites is substituted by Fe3+ ones. It shown that under such doping, material retains cubic spinel structure characteristic parent FeCr2O4 compound. However, values critical temperatures have changed. Both orbital magnetic orderings occur at about 120 K, rearrangement associated with an onset spiral modulation takes place 26 K. Mössbauer studies wide temperature range make it possible to accurately control content iron ions, their valence states, local environment, therefore, allowing deeper understanding features revealed transformations.