Precise resistivity measurement in PrInAg2 down to 50 mK

Resistivity of a Heusler-type intermetallic paramagnetic compound PrInAg2 is measured precisely down to 50 mK. An empirical equation is well determined as Δ ρ∝+ 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 Γ3. The results are not consistent with Δρ∝±T1/2 which is expected from the single impurity quadrupolar Kondo model near the ground state.