Abstract
Elastic constant and thermal expansion data for a high quality single crystal of are presented. The data yield a detailed B-T phase diagram exhibiting a previously unknown high-field phase. From the unusual behavior of the elastic constants and the thermal expansion on entering the superconducting phase we deduce that, in contrast to other heavy-fermion superconductors, the superconducting phase of does not coexist with the surrounding phase.
- Received 22 November 1993
DOI:https://doi.org/10.1103/PhysRevLett.72.1754
©1994 American Physical Society