Non-Fermi-Liquid Behavior at a Ferromagnetic Quantum Critical Point inNixPd1−x

Abstract

${\mathrm{Ni}}_x{\mathrm{Pd}}_{1-x}$ is investigated at the border of enhanced Pauli paramagnetism and itinerant ferromagnetism. We provide convincing experimental evidence for the occurrence of a ferromagnetic (FM) quantum critical point (QCP). At a nickel concentration $x=0.025\mathrm{}\pm 0.002$, the concentration dependence of the Curie temperature, as well as the temperature dependencies of the electrical resistivity, the magnetic susceptibility, and of the linear term of the specific heat follow the theoretical predictions of a FM QCP within experimental uncertainties.