RESISTIVITY AND MAGNETORESISTANCE OF DILUTE SOLUTIONS OF Cr IN Cu-Ni ALLOYS

摘要

The difference ?n resistivity between each Cu-Ni(Cr) alloys and its Cr-free equivalent did not depend linearly on log(T);the difference in magnetoresistance between these two alloys was found to be negative. The Cr impurity contribution to the resistivity and magnetoresistance showed a marked dependence on the Ni concentration and was proportional to the Cr con¬centration only in the alloys containing 23 at. % Ni. These results are discussed in terms of spin flip scattering processes, characteristic of the Kondo effect, subject to Cr-Cr interactions and the local Ni environment around a Cr cell.