Magnetic and non-Fermi-liquid phases inU1−xYxPd2Al3

摘要: Measurements of the temperature and frequency dependence magnetic susceptibility Χ field electrical resistivity p U 1 - x Y Pd 2 Al 3 system were performed for yttrium concentrations in range 0.1≤x≤0.85. The versus concentration phase diagram is revised to include a region which spin-glass freezing observed 0.25≤x≤0.65, adjacent antiferromagnetism previously at lower concentrations. Non-Fermi-liquid (NFL) behavior found 0.65≤x≤0.85. NFL regime can be described by power law form p(T)=p(0)[1-a(T/T 0 ) n ] with value that changes from n1.5 x≤0.75 n1 x=0.8 0.85. It noteworthy abrupt decrease occurs near critical c r T S G vanishes, room residual resistivities also drop sharply this x. This suggests change electronic structure responsible suppression may determined quantum point.