Single-crystal and powder neutron diffraction study of the FeXMn1 XS solid solutions

Abstract The α-MnS-based Fe X Mn 1− X S (0  x x  = 0) to 200 K ( x  = 0.29) observed in these materials is accompanied by a decrease in the NaCl-type cubic lattice parameters. It is established that at the symmetry transformation in the compositions with x  = 0.25 and 0.29 the structural transition occurs, which is followed by the magnetic transition. These features make the Fe X Mn 1− X S solid solutions interesting for both fundamental study of the interrelation between the magnetic, electrical, and structural properties in MnO-type strongly correlated electron systems and application.