Electrical Resistivity of Exchange-Enhancedα-Cerium Under Pressure

Abstract

We have measured the temperature (1.2 to 80 K) and pressure (3 to 50 kbar) dependences of the electrical resistivity of the exchange-enhanced $\alpha$ phase of cerium. The exchange-enhancement factor decreases with increasing pressure, enabling us to determine the spin-fluctuation resistivity ${\rho }_{\mathrm{sf}}\mathrm{}(T,P)\mathrm{}$ by subtracting out the phonon resistivity obtained at high pressures where the enhancement becomes relatively smaller, A strong initial $T^2$ dependence of ${\rho }_{\mathrm{sf}}$ was observed. These results can be interpreted within the framework of the Kaiser-Doniach theory.