Magnetocompositonal correlation function for FeV13.5%

Full text: Many properties of alloys are dependent upon the type of atomic order present and as such, for future development of metallic alloys, it is imperative that an intricate understanding of the ordering processes is obtained. Of particular importance for the transition metal series is the presence of localised magnetic moments which can have a profound effect on the electronic structure, and hence the types of atomic order observed. A first principles ab initio theory has been developed which incorporates these localised moments, and leads to the determination of correlation functions which indicate the type of short-range order present in the high temperature disordered state. The magnetocompositional correlation function, which measures the local magnetic moments dependence on the local atomic environment, has been calculated for an FeV13.5% crystal below the ferromagnetic ordering temperature. This function is observable using polarised neutron scattering allowing a determination of the validity of the theory. Recently obtained results for a single FeV13.5% crystal will be presented for comparison