Effects of chemical disorder in the itinerant antiferromagnet Ti V Au.

The fragile nature of itinerant magnetism can be exploited using non-thermal parameters to study quantum criticality. The recently discovered quantum critical point (QCP) in the Sc-doped (hole-like doping) itinerant antiferromagnet TiAu (Ti Sc Au) raised questions about the effects of the crystal and electronic structures on the overall magnetic behavior. In this study, doping with V (electron-like doping) in Ti V Au introduces chemical disorder which suppresses antiferromagnetic order from [Formula: see text] 36 K for x  =  0 down to 10 K for x  =  0.15, whereupon a solubility limit is reached. Signatures of non-Fermi-liquid behavior are observed in transport and specific heat measurements similar to Ti Sc Au, even though Ti V Au is far from a QCP for the accessible compositions [Formula: see text].