Magnetism and electronic transport in the concentrated Kondo system (U/sub x/La/sub 1-//sub x/)/sub 2/Zn/sub 17/

Journal Article · Wed Apr 01 00:00:00 EST 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.35.5025· OSTI ID:6776189

Olivier, M; Siegrist, T; McAlister, S P

Magnetization, resistivity, and magnetoresistivity have been studied in the concentrated Kondo system (U/sub x/La/sub 1-//sub x/)/sub 2/Zn/sub 17/ (x = 0.05, 0.3, 0.9, 1), from 0.35 to 295 K and in magnetic fields up to 6.7 T. The effective magnetic moment per U atom is independent of concentration whereas the paramagnetic Curie-Weiss temperature varies monotonically from -120 K in U/sub 2/Zn/sub 17/ to -7 K in (U/sub 0.05/La/sub 0.95/)/sub 2/Zn/sub 17/. At low concentrations U behaves like a Kondo impurity, but concentration effects on the transport properties already show up in alloys with x = 0.3. Resistivity data show that the Kondo temperature increases with x through the whole series. In U/sub 2/Zn/sub 17/ and (U/sub 0.9/La/sub 0.1/)/sub 2/Zn/sub 17/, the similar behavior observed above 50 K is in qualitative agreement with the independent Kondo impurity model. A marked difference is found in the temperature dependence of the electrical resistivity in the magnetically ordered phase (4.7 K for x = 0.9 and 9.8 K for x = 1). In contrast to the large drop seen in U/sub 2/Zn/sub 17/ an increase is observed in (U/sub 0.9/La/sub 0.1/)/sub 2/Zn/sub 17/.

• Research Organization: Solid State Chemistry, Division of Chemistry, National Research Council of Canada, Ottawa, Ontario, Canada K1AX9
• OSTI ID: 6776189
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 35:10
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LANTHANUM COMPOUNDS
ELECTRIC CONDUCTIVITY
KONDO EFFECT
MAGNETIZATION
MAGNETORESISTANCE
URANIUM COMPOUNDS
ZINC COMPOUNDS
CURIE POINT
CURIE-WEISS LAW
LOW TEMPERATURE
MAGNETIC FIELDS
MEDIUM TEMPERATURE
POLYCRYSTALS
TEMPERATURE DEPENDENCE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ACTINIDE COMPOUNDS
CRYSTALS
ELECTRICAL PROPERTIES
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
360104* - Metals & Alloys- Physical Properties