Abstract
Resistivity of a Heusler-type intermetallic paramagnetic compound PrInAg 2 is measured precisely down to 50 mK. An empirical equation is well determined as Δρ∝+ log T between 50 mK and 1 K. The system is expected as an example of the quadrupolar Kondo system, since the Pr 3+ (4f 2) ion in the material has a non-magnetic doublet ground state Γ 3. The results are not consistent with Δ ρ∝± T 1/2 which is expected from the single impurity quadrupolar Kondo model near the ground state.
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