Low temperature neutron diffraction and magnetization of Fe25Cu75 solid solutions

Abstract Metastable Fe 25 Cu 75 solid solution obtained by high-energy ball milling has been studied by means of neutron thermo-diffraction and magnetization measurements. This material, which crystallizes in a face centered cubic (FCC) crystal structure, is ferromagnetic, with a value for the Curie temperature, around 190 K. The linear thermal expansion coefficient, α T , has been estimated from the temperature dependence of the lattice parameter in the temperature range 5–300 K. An increase in the value of α T following the normal trend observed in other metallic compounds is observed below 150 K, however, above this temperature α T remains almost constant indicating a slight magneto-volume effect in this material.