We have performed different neutron diffuse scattering measurements in ${\text{Fe}}_{1-x}{\text{Cr}}_x$ solid solutions, in a concentration range $0<x<0.15$, 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 $x_0=0.110\left(5\right)$. 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.

• Received 23 July 2010

DOI:https://doi.org/10.1103/PhysRevB.82.104203