Specific heat, magnetic susceptibility, and resistivity of an U/sub 0. 85/La/sub 0. 15/Al/sub 2/ alloy

Journal Article · Sun May 15 04:00:00 EDT 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.27.6518· OSTI ID:5926928

Wire, M S; Stewart, G R; Johanson, W R; Fisk, Z; Smith, J L

The compound UAl/sub 2/ exhibits ferromagnetic spin fluctuations at low temperatures. When 15 at. % La is substituted for U in UAl/sub 2/, we find the low-temperature magnetic susceptibility increases by more than a factor of 2. We have also measured specific heat on this sample at low temperatures. We find that the electronic density of states has increased by 60% and the spin-fluctuation contribution has increased by a factor of 2. We conclude from these measurements that the Stoner enhancement factor has increased by approx.30% and the spin-fluctuation temperature has increased by approx.50% as compared with UAl/sub 2/. In addition, we have measured the electrical resistivity of U/sub 0.85/La/sub 0.15/Al/sub 2/ We find the residual resistivity to be approximately an order of magnitude larger than that of UAl/sub 2/. We attribute this effect to the breaking of U--U bonds by the La atoms.

• Research Organization: Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 5926928
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 27:10; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE ALLOYS
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
ANGULAR MOMENTUM
AUGMENTATION
BOND LENGTHS
DATA
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
EXPERIMENTAL DATA
FERROMAGNETIC MATERIALS
INFORMATION
LENGTH
LOW TEMPERATURE
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MATERIALS
NUMERICAL DATA
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
QUANTITY RATIO
SAMPLE PREPARATION
SPECIFIC HEAT
SPIN
TANTALUM ALLOYS
TERNARY ALLOY SYSTEMS
THERMODYNAMIC PROPERTIES
URANIUM ALLOYS
URANIUM BASE ALLOYS