Fermi-liquid behavior of electrical resistivity in the dilute uranium system UxLa1−xRu2Si2

Electrical resistivity measurements have been performed on the dilute uranium compound UxLa1−xRu2Si2 (x=0.07) with the current along the a and the c axes between 300 K and 28 mK. The electrical resistivity, ρ, along the a and the c axes decreases as temperature is lowered below 300 K. In the low-temperature region between 7 K and 28 mK, the magnetic contribution of the 5f electron to the resistivity, ρm, exhibits the Fermi-liquid behavior with a clear T2 dependence. The Kadowaki–Woods ratio A5f/γ5f2 is estimated from ρm and the specific heat data previously reported, and is found to be the same order as that of URu2Si2. This indicates that the enhanced density of states at the Fermi level causes the T2 dependence of ρm in the dilute uranium compound UxLa1−xRu2Si2.