Magnetic susceptibility and electrical resistivity of Au-Mn alloys

Abstract

From magnetic measurements made on Au-Mn alloys in both the states, ordered and disordered, the magnetic moment μ of the manganese atoms and the Weiss temperature Θ of the alloys have been determined. In the temperature range used (90–1020°K), the electrical resistivity of the alloys has also been determined. The Θ values of the alloys are found to vary regularly with composition, being positive at low and negative at high manganese concentrations. Resistivity/concention curves have been obtained in three different states of the alloys, the atomic as well as the magnetic order being considered. The magnetic and the electrical measurements show a marked dependence of the magnetic transformation points on the degree of atomic order of a given alloy, the Curie and the Néel points being displaced toward lower temperatures with decreasing atomic ordering of the alloy.