Abstract
The superconducting transition temperatures and Néel temperatures have been determined for thirty single crystals. For , deviations from de Gennes scaling occur that are probably due to crystalline electric field effects. For there is a complete breakdown of de Gennes scaling. In , suppresses an order of magnitude more rapidly than . This breakdown is inferred to arise from pair breaking by collective magnetic excitations.
- Received 28 February 1996
DOI:https://doi.org/10.1103/PhysRevLett.77.163
©1996 American Physical Society