Resistivity and susceptibility near the QCP in disordered UCu5−xNix

The question of whether the temperature dependences of the magnetic susceptibility and the electrical resistivity of UCu5−xNix near, and away from, the QCP where TN is suppressed to T = 0 are due to intrinsic fluctuations or are dominated by disorder effects is addressed. The interesting ρ ∝ log T behavior below 2 K present for 0.75 ⩽ x ⩽ 1.1 is analyzed and discussed.