Atomic short-range order in Fe1−xCrx alloys studied by 57Fe Mössbauer spectroscopy

► Mössbauer measurements of iron-based dilute solid solutions FeCr. ► Developing and testing modern theoretical models of FeCr alloys. ► Our findings are unique as they concern ferromagnetic state of iron. ► Obtained change of sign of α1 and α2 parameter close to x=0.035. ► Magnetic frustration in ferromagnetic FeCr alloys.