Unusual Electron Transport Properties of U_{0.05}Y_{0.95}Al_2

• Authors: V. Tran
• Languages of publication: EN

Abstracts

EN

We report a detailed study of the resistivity (ρ(T)) and thermoelectric power (S(T)) of the alloy U_{0.05}Y_{0.95}Al_2, which crystallises in the cubic MgCu_2-type structure. The resistivity is found to follow ρ(T) ∝ ln T between 15 and 40 K and a quasi-linear temperature dependence -T^{1.16} 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) ∝ T^2) is recovered. S(T)/T shows a T^{0.5} power law for T <12 K. The low-temperature unconventional features observed in U_{0.05}Y_{0.95}Al_2 are presumably due to the presence of the two-channel Kondo effect.

Keywords

EN

72.15.Jf; 72.15.Qm

Discipline

• 72.15.Qm: Scattering mechanisms and Kondo effect(see also 75.20.Hr Local moments in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions in magnetic properties and materials)
• 72.15.Jf: Thermoelectric and thermomagnetic effects

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 1
• Pages: 387-390

Dates

published

2008-01

received

2007-07-09

Contributors

author

V. Tran

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław, Poland

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Identifiers

DOI

10.12693/APhysPolA.113.387