New heavy-fermion system, NpBe13, with a comparison to UBe13 and PuBe13
- 1. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Description
We have prepared single crystals of NpBe13, Np/sub 0.68/U/sub 0.32/Be13, and PuBe13 and measured their resistivity, susceptibility, and specific heat down to low temperatures. NpBe13 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 UBe13 and a γ(T = 0) of approximately 900 mJ/mole K2. PuBe13 may be described as a Kondo-type system, with certain inconsistencies. The data are compared to results for UBe13 and are consistent with a narrow f band at the Fermi energy in UBe13 moving lower in energy with the addition of f electrons in heavier actinide elements to create a Kondo resonance by PuBe13
Additional details
Publishing Information
- Journal Title
- Phys. Rev., B: Condens. Matter
- Journal Volume
- 30
- Journal Issue
- 3
- Series
- Phys. Rev., B: Condens. Matter.
- Journal Page Range
- 1249-1252
- ISSN
- 0163-1829
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 16033820
- Subject category
- S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BERYLLIUM ALLOYS; CURIE-WEISS LAW; ELECTRIC CONDUCTIVITY; EXPERIMENTAL DATA; FERMIONS; KONDO EFFECT; MAGNETIC SUSCEPTIBILITY; MONOCRYSTALS; NEPTUNIUM ALLOYS; PLUTONIUM ALLOYS; SAMPLE PREPARATION; SPECIFIC HEAT; SUPERCONDUCTIVITY; ULTRALOW TEMPERATURE; URANIUM ALLOYS
- Descriptors DEC
- ACTINIDE ALLOYS; ALLOYS; CRYSTALS; DATA; ELECTRICAL PROPERTIES; INFORMATION; MAGNETIC PROPERTIES; NUMERICAL DATA; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES