Non-{{Fermi}}-{{Liquid Behavior}} and {{Magnetic Fluctuations}} at the {{Quantum Phase Transition}} in {{CeCu6}}-{{xAux}}

CeCu6-xAux has become a prototype heavy-fermion system where, starting from not magnetically ordered CeCu6, Au doping introduces long-range incommensurate antiferromagnetism for x$>$ xc $\approx$ 0.1. At the critical concentration xc, the unusual magnetic fluctuations probed by inelastic neutron scattering lead to non-Fermi-liquid behavior, i.e. to anomalous low-temperature thermodynamic and transport properties. In magnetically ordered alloys, hydrostatic pressure can be employed to tune the magnetic--nonmagnetic transition. The effect of pressure in suppressing the antiferromagnetic order is contrasted by the effect of a magnetic field by way of a detailed study for x = 0.2.     «

CeCu6-xAux has become a prototype heavy-fermion system where, starting from not magnetically ordered CeCu6, Au doping introduces long-range incommensurate antiferromagnetism for x$>$ xc $\approx$ 0.1. At the critical concentration xc, the unusual magnetic fluctuations probed by inelastic neutron scattering lead to non-Fermi-liquid behavior, i.e. to anomalous low-temperature thermodynamic and transport properties. In magnetically ordered alloys, hydrostatic pressure can be employed to tune the ma...     »