Thin crystalline and magnetic structures of alloys under Ni3Fe-Ni3V concentration transition

The parameters of atomic and magnetic ordering have been measured by means of neutron diffraction analysis and magnetic methods. The long range atomic orders of Ni3 Fe and Ni3 V superstructures, as well as the temperatures of Curie and of spin glass (freezing) were obtained. It is shown, that the concentration structure transition is the first kind phase transition and the establishment of long range ferromagnetic order goes together with the formation of cluster spin glass. It was found out that the cluster spin glass was formed by the nucleus of an ordered phase of Ni3 Fe in paramagnetic matrix Ni3 V. 9 refs