Pressure dependence of spin-fluctuation effects in the specific heat of the heavy-fermion superconductor UPt/sub 3/

Journal Article · Mon Jul 14 04:00:00 EDT 1986 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.57.234· OSTI ID:5393245

Brodale, G E; Fisher, R A; Phillips, N E; Stewart, G R; Giorgi, A L

UPt/sub 3/ is a heavy-fermion superconductor with indications of coexisting long-range ferromagnetic spin fluctuations. Measurements of its specific heat at pressures of 0, 3.8, and 8.9 kbar between 0.35 and 20 K show that the spin-fluctuation terms are extremely sensitive to pressure: the linear term decreases by --25% at 8.9 kbar; the T-italic/sup 3/ and T-italic/sup 3/ lnT-italic terms decrease by factors of the order of 4. Comparison with the pressure dependence of the critical temperature suggests that the superconductivity is of a form that is e-italicn-italich-italica-italicn-italicc-italice-italicd-italic by spin fluctuations.

• Research Organization: Materials and Molecular Research Division, Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5393245
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 57:2; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTINIDE COMPOUNDS
ANGULAR MOMENTUM
DATA
ELEMENTARY PARTICLES
EXPERIMENTAL DATA
FERMIONS
FERROMAGNETISM
FLUCTUATIONS
HEAVY LEPTONS
HIGH PRESSURE
INFORMATION
LEPTONS
MAGNETISM
NUMERICAL DATA
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
PLATINUM COMPOUNDS
POSTULATED PARTICLES
PRESSURE DEPENDENCE
SPECIFIC HEAT
SPIN
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
URANIUM COMPOUNDS
VARIATIONS
VERY HIGH PRESSURE
VERY LOW TEMPERATURE