On the magnetic order in R(57Fe)Mn2

In the present study,57Fe is used as a local probe in order to monitor both the development of the Mn moment and its temperature dependence. The different crystal structures present (C15 and C14) were found to only insignificantly influence the hyperfine pattern. Both the simultaneous presence of magnetic and non-magnetic Mn atoms and the specific easy axis of magnetization in a given compound is found to lead to the occurrence of additional subspectra. Within the Mossbauer effect time window, no substantial magnetic correlations could be detected aboveTC.