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

Conference · Mon Jan 01 00:00:00 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
• Resource Relation: Conference: Conference on magnetism and magnetic materials, San Diego, CA (USA), 30 Oct - 2 Nov 1990
• Country of Publication: United States
• Language: English

Related Subjects

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