RESISTANCE MAXIMUM IN COPPER MANGANESE DILUTE ALLOYS

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 log T 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 log T 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. © 1969, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.