Resistivity and magnetoresistance of (U sub 1 minus x M x )Be sub 13 ( M =La,Th,Y,Sc,Hf)

Journal Article · Sun Sep 01 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.44.5040· OSTI ID:5207675

Andraka, B; Kim, W W; Kim, J S; Stewart, G R ^[1]

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1. Department of Physics, University of Florida, Gainesville, Florida (USA)

Electrical resistivity and longitudinal magnetoresistance of (U{sub 1{minus}{ital x}M{ital x}})Be{sub 13}, with {ital M}=La, Th, Y, Sc, and Hf, were investigated in the temperature range 0.4--300 K and fields to 14 T. Alloying-caused changes of the resistivity can be correlated with variations of U-Be separation, or localization or delocalization of U 5{ital f} states. The large, negative magnetoresistance of UBe{sub 13} is severely depressed when only a minor, {similar to}5%, amount of impurities are introduced for U. The changes of magnetoresistance, for {ital x}{le}0.05, cannot be related to either lattice-pressure effects or the electronic configuration of {ital M}. It is suggested that the large, negative magnetoresistance, similarly to the enhanced specific heat, results from intersite 5{ital f} correlations existing in UBe{sub 13} at low temperatures.

• DOE Contract Number: FG05-86ER45268
• OSTI ID: 5207675
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:10; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE ALLOYS
ALLOYS
BERYLLIUM ALLOYS
BERYLLIUM BASE ALLOYS
CRYSTAL DOPING
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY LEVELS
F STATES
HAFNIUM ALLOYS
HYBRIDIZATION
LANTHANUM ALLOYS
LOW TEMPERATURE
MAGNETORESISTANCE
MEDIUM TEMPERATURE
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SCANDIUM ALLOYS
SPECIFIC HEAT
STOICHIOMETRY
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
THORIUM ALLOYS
ULTRALOW TEMPERATURE
URANIUM ALLOYS
VERY LOW TEMPERATURE
YTTRIUM ALLOYS