New heavy-fermion system, NpBe/sub 13/, with a comparison to UBe/sub 13/ and PuBe/sub 13/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We have prepared single crystals of NpBe/sub 13/, Np/sub 0.68/U/sub 0.32/Be/sub 13/, and PuBe/sub 13/ and measured their resistivity, susceptibility, and specific heat down to low temperatures. NpBe/sub 13/ has an itinerant-electron magnetic transition at 3.4 K, with a large temperature-dependent specific heat above this transition that is quite similar to that observed in the heavy-fermion superconductor UBe/sub 13/ and a ..gamma..(T = 0) of approximately 900 mJ/mole K/sup 2/. PuBe/sub 13/ may be described as a Kondo-type system, with certain inconsistencies. The data are compared to results for UBe/sub 13/ and are consistent with a narrow f band at the Fermi energy in UBe/sub 13/ moving lower in energy with the addition of f electrons in heavier actinide elements to create a Kondo resonance by PuBe/sub 13/.
- Research Organization:
- Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
- OSTI ID:
- 6364026
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 30:3; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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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 ALLOYS
ALLOYS
BERYLLIUM ALLOYS
CRYSTALS
CURIE-WEISS LAW
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
FERMIONS
INFORMATION
KONDO EFFECT
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MONOCRYSTALS
NEPTUNIUM ALLOYS
NUMERICAL DATA
PHYSICAL PROPERTIES
PLUTONIUM ALLOYS
SAMPLE PREPARATION
SPECIFIC HEAT
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
ULTRALOW TEMPERATURE
URANIUM ALLOYS
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 ALLOYS
ALLOYS
BERYLLIUM ALLOYS
CRYSTALS
CURIE-WEISS LAW
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
FERMIONS
INFORMATION
KONDO EFFECT
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MONOCRYSTALS
NEPTUNIUM ALLOYS
NUMERICAL DATA
PHYSICAL PROPERTIES
PLUTONIUM ALLOYS
SAMPLE PREPARATION
SPECIFIC HEAT
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
ULTRALOW TEMPERATURE
URANIUM ALLOYS