Phase diagram of UPt sub 3 from ultrasonic velocity measurements

Journal Article · Sun Oct 28 23:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.2298· OSTI ID:6174644

Adenwalla, S; Lin, S W; Ran, Q Z; Zhao, Z; Ketterson, J B; Sauls, J A; Taillefer, L; Hinks, D G; Levy, M; Sarma, B K ^[1]

---

1. Department of Physics and Astronomy, Northwestern University, Evanston, IL (USA) Department of Physics, University of Wisconsin-Milwaukee, Milwaukee, WI (USA) Centre de Recherches sur les Tres Basses Temperatures, CNRS, BP166X, Grenoble (France) Materials Science Division, Argonne National Laboratory, Argonne, IL (USA)

We present measurements of longitudinal ultrasonic velocity on single crystals of the heavy-fermion superconductor UPt{sub 3}. 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 UPt{sub 3} 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.

• OSTI ID: 6174644
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:18; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE ALLOYS
ALLOYS
ATTENUATION
CRITICAL FIELD
CRYSTALS
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
GINZBURG-LANDAU THEORY
HEAVY LEPTONS
INFORMATION
LEPTONS
MAGNETIC FIELDS
MONOCRYSTALS
NUMERICAL DATA
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
POSTULATED PARTICLES
SOUND WAVES
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
ULTRASONIC WAVES
URANIUM ALLOYS