Magnetic correlations in Cr–Fe–Mn alloy

Abstract Small angle neutron scattering (SANS) measurement has been performed on the reentrant ferromagnet Cr 60 Fe 20 Mn 20 alloy. An increase in the SANS intensity is observed below 100 K coinciding with an increase in the magnetization. It exhibits a maximum at 40 K and shifts to lower temperatures with increase in Q. The magnetic part of the SANS intensity fits to a Lorentzian at all temperatures. The temperature dependence of the inverse correlation length exhibits a minimum at 40 K. In the antiferromagnetic spin-glass phase at 15 K ferromagnetic correlations of ~40 A is observed.