Thermodynamic stability of the superconducting phase diagram of UPt[sub 3]
- Univ. of Amsterdam (Netherlands)
The superconducting phase diagram of UPt[sub 3], as determined by accurate dilatometry as function of temperature and magnetic field (B [parallel] c and B [perpendicular] c), exhibits three superconducting phases which meet in a tetracritical point. The authors show that the measured phase diagrams are thermodynamically stable and that all four phase lines are of second order. Via Ehrenfest relations the pressure dependence of the various phases has been determined. The so-called C phase is the most stable phase under uniaxial pressure along the c-axis (p[sub c] > 2.5 kbar). The resulting phase diagram in the p[sub c]-T plane yields stringent constraints on the fourth order coupling constants in the Ginzburg-Landau scenario of a vector superconducting order parameter coupled to a symmetry breaking field.
- OSTI ID:
- 5774827
- Journal Information:
- Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 93:1-2; ISSN JLTPAC; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360107* -- Metals & Alloys-- Superconducting Properties-- (1992-)
ACTINIDE ALLOYS
ALLOYS
DIAGRAMS
DILATOMETRY
GINZBURG-LANDAU THEORY
MAGNETIC FIELDS
ORDER PARAMETERS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
PLATINUM ALLOYS
PLATINUM BASE ALLOYS
PLATINUM METAL ALLOYS
PRESSURE DEPENDENCE
SUPERCONDUCTORS
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
THERMAL ANALYSIS
THERMODYNAMIC PROPERTIES
URANIUM ALLOYS