Abstract
We present a detailed study of the phase diagram of the antiferromagnetic Kondo-lattice compound under pressure up to 100 kbar by resistivity measurements. Antiferromagnetic order vanishes at a critical pressure At this quantum critical point a complete superconducting transition is found in the pressure range from 24 to 27 kbar. Normal state properties near the critical point show strong deviations from Fermi-liquid behavior. In magnetic fields just above the upper critical field Fermi-liquid behavior is restored. For shows a clean dependence up to a crossover temperature which increases linearly with pressure. The temperature dependence of the upper critical field can be described with a strong coupling model in the clean limit.
- Received 9 March 2001
DOI:https://doi.org/10.1103/PhysRevB.65.024425
©2001 American Physical Society