Non-Fermi-liquid behaviour around the magnetic quantum critical point in UGa3

We studied the electronic state of UGa3 by measuring the electrical resisti vity under pressure. When pressure is applied to UGa3, the Neel temperature T-N = 67 K decreases steeply and becomes zero around 2.6 GPa. Correspondin gly, the coefficient A in the electrical resistivity rho = rho (0) C AT(2), which is characteristic for Fermi liquid, increases steeply with increasin g pressure. Around a magnetic quantum critical point of 2.6 GPa, a non-Ferm i-liquid behaviour is found, showing a linear T-dependence of the resistivi ty, although the Fermi-liquid behaviour recovers above 4 GPa and the A-valu e decreases with increasing pressure. Furthermore, a resistivity drop, whic h might be related to superconductivity, was found below 0.3 K at 1.5 GPa, where the residual resistivity po has a maximum.