Abstract
The electrical resistivity of a series of Co 2 A Laves phase compounds was measured in order to investigate its mutual correlation with their magnetic properties. In the weakly Pauli-paramagnetic compounds, Co 2 Ti, Co 2 Zr and Co 2 Nb, the electrical resistivity shows a temperature variation proportional to T 3 below about 30 K. The electrical resistivity of the strongly Pauli-paramagnetic Co 2 Y compound shows a fairly large temperature variation proportional to T 2 below about 20 K, which seems to be due to the paramagnon scattering. The experimental results of the electrical resistivity and the magnetization suggest that the substitutional cobalt atoms in the cobalt-rich Co 2 A (A=Ti, Zr and Nb) compounds give rise to the Kondo effect with a characteristic temperature of ∼100 K.
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