Thermal conductivity of superconducting UPt sub 3
- CNRS, Grenoble (France)
- Univ. de Geneve (Switzerland)
- Univ. of Southern California, Los Angeles (United States)
- Los Alamos National Labs., NM (United States)
The thermal conductivity {kappa} of the heavy-fermion superconductor UPt{sub 3} was measured on two single crystals of different quality as a function of temperature and applied magnetic field for different orientations of the heat current relative to both the field and the crystalline axes. The temperature dependence of {kappa} is far from exponential and nearly the same for both crystals, in which the heat current is, respectively, parallel and perpendicular to the hexagonal c axis, suggesting a gap structure with nodes in the basal plane and normal to it. The field dependence of {kappa} is strongly anisotropic. In the best sample at low fields, where the scattering of heat carriers by vortices is thought to be important, {kappa}(H) depends on the relative orientation of field and current. On the other hand, at high fields near H{sub c2} (in both samples), {kappa}(H) depends on the relative orientation of field and crystalline axes, reflecting an anisotropy in the gap structure and in the Fermi velocities.
- OSTI ID:
- 5286053
- Journal Information:
- Journal of Low Temperature Physics; (United States), Journal Name: Journal of Low Temperature Physics; (United States) Vol. 84:3-4; ISSN 0022-2291; ISSN JLTPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE ALLOYS
ALLOYS
ANISOTROPY
CRITICAL FIELD
CRYSTALS
INTERMETALLIC COMPOUNDS
MAGNETIC FIELDS
MONOCRYSTALS
PHYSICAL PROPERTIES
PLATINUM ALLOYS
PLATINUM METAL ALLOYS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
URANIUM ALLOYS