A new neutron study of the short range order inversion in Fe$_{1-x}$Cr$_x$

Understand

We have performed new neutron diffuse scattering measurements in Fe$_{1-x}$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, 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 principle calculations and atomistic simulations.