The measurements of Mössbauer effect on Fe57 were performed in the ternary alloys Fe70[Pt1-x(Rh, Re)x]30, where x varies from 0 to 10 %. The Mössbauer spectra obtained show the splitting of lines, corresponding to the existence of two values of effective fields on Fe57, which may be due to the coexistence of ferro and antiferromagnetic phases in alloys. This is also confirmed by the measurements of temperature dependence of the intensity of resonance line of γ-photons by the motionless source and adsorber