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

Journal Article · Mon Apr 15 04:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.347972· OSTI ID:5625627

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. P-10, MS K764, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
2. ETH, Zurich, c/o Paul Scherrer Institute, Villigen, (Switzerland)
3. Physics Department U. C. Riverside, Riverside, California 92521-0413 (USA)

We report specific heat and {mu}SR measurements on Th ({ital x} =0.019) and/or B ({ital y}=0.03) substituted UBe{sub 13}. The specific heat data show that either Th or B substitution reduces the Kondo temperature {ital T}{sub {ital 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{lt}{ital x}{lt}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 {ital T}{sub {ital K}} is reduced.

• OSTI ID: 5625627
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE ALLOYS
ACTINIDES
ALLOYS
BERYLLIUM ALLOYS
BORON
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
ENTROPY
IMPURITIES
KONDO EFFECT
METALS
MUON SPIN RELAXATION
PHYSICAL PROPERTIES
POLYCRYSTALS
RELAXATION
SEMIMETALS
SPECIFIC HEAT
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
THORIUM
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
URANIUM ALLOYS
VERY LOW TEMPERATURE