Unusual Electron Transport Properties of U0.05Y0.95Al2
V.H. Tran
Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland
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Received: 9 07 2007;
We report a detailed study of the resistivity (ρ(T)) and thermoelectric power (S(T)) of the alloy U0.05Y0.95Al2, which crystallises in the cubic MgCu2-type structure. The resistivity is found to follow ρ(T) ∝ lnT between 15 and 40 K and a quasi-linear temperature dependence -T1.16 for T < 10 K. At a magnetic field of 9 T a Kondo-type maximum occurs in the resistivity data at 7 K, below which the Fermi liquid behaviour (ρ(T) ∝ T2) is recovered. S(T)/T shows a T0.5 power law for T < 12 K. The low-temperature unconventional features observed in U0.05Y0.95Al2 are presumably due to the presence of the two-channel Kondo effect.
DOI: 10.12693/APhysPolA.113.387
PACS numbers: 72.15.Jf, 72.15.Qm