Interactions between anomalous local moments: magnetic ordering in rhodium-iron alloys

Abstract

The results are reported of a study of the low-temperature magnetization and resistivity behaviour of Rh-Fe alloys containing 3-15 at.% Fe susceptibility maxima and other features characteristic of random solid-solution ordering are found; although the resistivity behaviour, as for more dilute alloys, is atypical. The ordering temperature rises much more slowly with solute concentration in well known systems like Cu-Mn and this behaviour is ascribed to a tendency of isolated solute atoms to be nonmagnetic at low temperatures but capable of localized spin fluctuations. Susceptibility data for solutions of 1% and 11% of cobalt in rhodium show no magnetic ordering behaviour and little local-moment character