Thermodynamics and magnetism in Th sub x U sub 1-x Be sub 13-y B sub y

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6824818

Heffner, R H; Beyermann, W P; Hundley, M F; Thompson, J D; Smith, J L; Fisk, Z; Bedell, K ^[1]; Birrer, P; Baines, C; Gygax, F N; Hitti, B; Lippelt, E; Ott, H R; Schenck, A ^[2]; MacLaughlin, D E ^[3]

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1. Los Alamos National Lab., NM (USA)
2. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
3. California Univ., Riverside, CA (USA). Dept. of Physics

We report specific heat and {mu}SR measurements on Th (x = 0.019) and/or B (y = 0.03) substituted UBe{sub 13}. The specific heat data show that either Th or B substitution reduces the Kondo temperature T{sub K} and increases the entropy at the superconducting transition by almost 20%, indicating an enhanced density of states. However, whereas {mu}SR shows clear evidence for magnetic correlations for Th substitutions (0.019 < x < 0.043), no magnetism is observed for B substitutions. The enhanced specific heat jump in the B-substituted material is associated with a change in the superconducting properties as T{sub K} is reduced.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6824818
• Report Number(s): LA-UR-90-3170; CONF-901004--6; ON: DE91000372
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ACTINIDE COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BERYLLIUM COMPOUNDS
BORON COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
MAGNETISM
PHYSICAL PROPERTIES
SPECIFIC HEAT
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
THORIUM COMPOUNDS
URANIUM COMPOUNDS