Abstract
We have determined the effect of pressure on the resistance and superconducting transition temperature of () and compare our results to those obtained on high-quality . The transition temperature, which is 90 K or greater at ambient pressure for all four compounds, is enhanced by pressure in each at rates between 0.09 and 0.19 K/kbar. Interestingly, the presence of a localized moment in the rare-earth compounds appears to have no influence on the pressure response. From the positive we infer a positive change in the thermal expansion upon entering the superconducting state.
- Received 19 May 1987
DOI:https://doi.org/10.1103/PhysRevB.36.2404
©1987 American Physical Society