DIFFUSE NUCLEAR AND MAGNETIC NEUTRON-SCATTERING IN QUENCHED CO1-XMNX ALLOYS

Diffuse neutron scattering measurements were performed on quenched Co1 -xMnx alloys with x = 0.31, 0.36, 0.39, 0.43 and 0.5, which belong to the transition region between ferromagnetism and antiferromagnetism. T he nuclear and magnetic cross sections were separated, and Cowley shor t-range order atomic parameters determined. It was found that the supe rantiferromagnetic behaviour of these alloys occurred owing to the exi stence of the antiferromagnetic clusters of the gamma-FeMn type caused by short-range order regions of the CuAu type.