Search for a quantum phase transition in U(Pt 1- xPd x) 3

Pd in U( Pt_1-x Pd_x) ₃ suppresses the superconducting T_c to 0 K at x_c ≃ 0.007 and induces a conventional AFM state for x⩾ x_c. The resistivity below 1 K for x⩽0.02 shows a deviation from Fermi liquid behavior described by ρ( T)= ρ₀+ AT^α; α varies from 2 for x=0 to 1.6 for x≃ x_c. This suggests that a quantum phase transition (QPT) exists near x_c. Transport for a sample with x=0.004< x_c has a pressure-independent exponent α=1.77, suggesting that if a QPT exists it may be associated with the magnetic transition.