Specific heats of dilute alloys of manganese in silver and copper at low temperatures and in magnetic fields

Abstract

Results of the investigation of the specific heats of three silver-manganese and of one copper-manganese alloy in the region of 1.3 to 20°K are given in this paper. Measurements were also carried out in magnetic fields of 5, 8.6, and 14 kOe. The C/T versus T-curves show the anomalous behaviour that a maximum occurs at low temperatures. This peak shifts to higher temperatures with increase in concentration. The contribution to the entropy from the solute can be estimated and turns out to reach a value between cR 1n 5 and cR 1n 6 (c = concentration, R = universal gas constant). Magnetic fields tend to broaden the peak and to decrease its maximum value. The curves for the alloys coincide within the accuracy of the measurements with those for the pure metals in the lower hydrogen region.