The paramagnetism of small amounts of Mn dissolved in Cu-Al and Cu-Ge alloys

Previous measurements of the valency of Mn in Cu-- Zn alloys were confirmed by measurements with the isoelectronic Cu-Al and Cu-Ge alloys as matrices for Mn. The valency, having the value 1 in pure copper, decreased slightly with increasing electron to atom ratio attaining the values 0.9 and 0.8 at the limiting composition in the Al and Ge alloys respectively. The apparent size of Mn in these alloys is discussed. (auth)