High-field specific heat of CeCu/sub 2/Si/sub 2/ and CeAl/sub 3/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We have measured the low-temperature specific heat, C, of both a superconducting and a nonsuperconducting sample of CeCu/sub 2/Si/sub 2/, as well as a sample of CeAl/sub 3/, in fields to 23 T. Contrary to all our previous C(H) work on nonsuperconducting Ce-based heavy-fermion systems (HFS's), the superconducting CeCu/sub 2.2/Si/sub 2/ sample has a small response to field, similar to the results for the other heavy-fermion superconductors UPt/sub 3/ and UBe/sub 13/. Thus, the previous correlation that U-based HFS's have small changes of C with field and that Ce-based HFS's have large changes must be discarded. We attempt to correlate other measured properties with our C(H) data for all HFS's for which such data exist, a total of seven systems, with only limited success. The possibility of a hidden variable linking the lack of large changes in C in 23 T with the occurrence of superconductivity in HFS's is discussed.
- Research Organization:
- Department of Physics, University of Florida, Gainesville, Florida 32611
- OSTI ID:
- 6361284
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:10; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
CERIUM ALLOYS
COMPARATIVE EVALUATIONS
COPPER ALLOYS
MAGNETIC FIELDS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SENSITIVITY ANALYSIS
SILICON ALLOYS
SPECIFIC HEAT
STOICHIOMETRY
SUPERCONDUCTORS
TERNARY ALLOY SYSTEMS
THERMODYNAMIC PROPERTIES
VERY LOW TEMPERATURE
360104* -- Metals & Alloys-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
CERIUM ALLOYS
COMPARATIVE EVALUATIONS
COPPER ALLOYS
MAGNETIC FIELDS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SENSITIVITY ANALYSIS
SILICON ALLOYS
SPECIFIC HEAT
STOICHIOMETRY
SUPERCONDUCTORS
TERNARY ALLOY SYSTEMS
THERMODYNAMIC PROPERTIES
VERY LOW TEMPERATURE