Evidence for Anderson Lattice Behavior in CeAg under Pressure

Abstract

The Curie temperature $T_0$ of CeAg as a function of hydrostatic pressure exhibits a well-defined maximum at $P\simeq 0.7$ GPa, giving clear evidence for Anderson lattice behavior. A rapid broadening of the resistive anomaly at $T_0$ for $P>~2.1$ GPa suggests a change in the character of the magnetic ordering. At these pressures the temperature dependence of the electrical resistivity to 300 K is highly anomalous, resembling closely that of Ce compounds thought to be in or near the mixed-valence regime.