The Resistance Maximum in Copper Manganese Dilute Alloys

Abstract

Electrical resistivity was measured in copper manganese alloy system with manganese concentration between 0.06 and 5.2 atomic percent in the temperature range from 2 to 300°K. The residual resistivity separated from the observed resistivity, has a maximum at certain temperature which is proportional to the concentration. The maximum arises from a combined effect of the Kondo logT term and the term caused by the effective molecular field due to spin ordering. In the sample with the concentration higher than 1 atomic percent the tail of the Kondo logT term was very large even at a temperature as high as 300°K. This fact enables us to explain the maximum in the concentrated sample.