Zum Magnetismus von aufgedampften Silber-Mangan-Legierungen
Ag-Mn alloys are produced by simultaneous condensation of both components on a substrate at 30 °K. By this method one gets a statistic distribution of the Mn atoms in Ag.The susceptibility of unannealed films obeys Curie's law for all Mn concentrations up to 16 at. per cent. Above that concentration the Curie-Weiss law holds with a negative paramagnetic Curie temperature. The magnetic moment decreases with increasing Mn concentration. For small concentrations the magnetic moment of a Mn atom corresponds to a spin of 4/2. The temperature of spin ordering is proportional to the Mn concentration.Annealing the films to 300 °K changes the distribution of the Mn atoms and the magnetic properties. The magnetic measurements on annealed films qualitatively agree with known measurements on molten Ag-Mn alloys.The magnetic properties are discussed by using theoretical arguments given byFriedel, Ziman, andOverhauser.