Critical point in the superconducting phase diagram of UPt/sub 3/

Journal Article · Mon Jul 03 04:00:00 EDT 1989 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.63.93· OSTI ID:6012998

Hasselbach, K; Taillefer, L; Flouquet, J

We report on detailed measurements of the specific heat of UPt/sub 3/, performed on a high-quality single crystal in a magnetic field perpendicular to the /ital c/ axis, at temperatures down to 100 mK. Two distinct phase transitions at zero field are seen to converge at a critical point, near /ital H/=5 kOe, which coincides with the sharp break in the /ital H//sub /ital c/2/ curve. Beyond that point, there is evidence for only one phase. Combining these thermodynamic results with ultrasonic attenuation and /ital H//sub /ital c/2/ data, an /ital H/-/ital T/ diagram is constructed which consists of a ''polycritical'' point and several superconducting phases.

• Research Organization: Centre de Recherches sur les Tres Basses Temperatures, Centre National de la Recherche Scientifique, BP 166X, 38042 Grenoble CEDEX, Fance(FR)
• OSTI ID: 6012998
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 63:1; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE COMPOUNDS
ATTENUATION
CRYSTALS
DIAGRAMS
ELEMENTARY PARTICLES
FERMIONS
HEAVY LEPTONS
LEPTONS
MAGNETIC FIELDS
MONOCRYSTALS
PHASE DIAGRAMS
PHYSICAL PROPERTIES
PLATINUM COMPOUNDS
POSTULATED PARTICLES
SOUND WAVES
SPECIFIC HEAT
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
ULTRASONIC WAVES
URANIUM COMPOUNDS