The charge structure and interaction mechanism on In-doped sulphur spinel

Abstract The charge structure and interaction mechanism on In-doped sulphur spinel FeIn x Cr 2− x S 4 are studied. The temperature dependence of magnetization μ B , measured from 60 K to room temperature, suggests that FeIn x Cr 2− x S 4 ( x = 0.1 , 0.3) are ferrimagnetic. The Neel temperature is decreased with increasing non-magnetic In substitution as consequence of reduction of superexchange interaction for increased lattice parameter. FeIn x Cr 2− x S 4 is investigated by Mossbauer spectra from 4.2 K to room temperature. The asymmetric line broadening is observed for the sample FeIn x Cr 2− x S 4 and considered to be dynamic Jahn–Teller relaxation. The charge state of Fe ions is ferrous in character.