We have performed different neutron diffuse scattering measurements in Fe1-xCrx solid solutions, in a concentration range 0<0.15, where the atomic distribution shows an inversion of the short range order. By optimizing the signal-background ratio with respect to a previous study, we obtain an accurate determination of the concentration of inversion x(0)=0.110(5). We determine the near-neighbor atomic short range order parameters and pair potentials, which change sign at x(0). The experimental results are compared with previous first-principles calculations and atomistic simulations.
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