Electrical Resistivity of Amorphous Ce-Ru Alloy under High Pressure and High Magnetic Field

The electrical resistivity, ρ, of amorphous Ce₅₈Ru₄₂ alloy (a-CeRu) has been measured as a function of temperature (T) at various pressures (P) up to 14GPa. At room temperature ρ decreases rapidly with increasing pressure: ∂log ρ/∂P= -0.9 GPa^-1 below 2GPa. The log T dependence in the ρ(T) curve due to Kondo scattering is observed up to 14 GPa. The slope of the ρ vs log T curve decreases with increasing pressure. At 4.2 K the magnetoresistance. Δρ/ρ, is positive and decreases with increasing pressure. These results suggest that the Kondo temperature. T_Kappa;, decreases with pressure in a-CeRu, i.e., the Kondo effect is suppressed by applying pressure.