Phase diagram of UPt3 from ultrasonic velocity measurements

S. Adenwalla*, S. W. Lin, Q. Z. Ran, Z. Zhao, J. B. Ketterson, J. A. Sauls, L. Taillefer, D. G. Hinks, M. Levy, Bimal K. Sarma

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

258 Scopus citations


We present measurements of longitudinal ultrasonic velocity on single crystals of the heavy-fermion superconductor UPt3. The measurements show clear signatures of second-order phase transitions in the superconducting state, with the velocity anomalies well accounted for by Ginzburg-Landau theory. From these signatures we construct a phase diagram for UPt3 that reveals all the boundary lines that have been identified as possible phase transitions. We are able to track the phase transition lines to a tetracritical point, located on the upper-critical-field curve, to within the width of the normal-superconducting transition.

Original languageEnglish (US)
Pages (from-to)2298-2301
Number of pages4
JournalPhysical review letters
Issue number18
StatePublished - 1990

ASJC Scopus subject areas

  • General Physics and Astronomy


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