Specific heat of pure and thoriated UBe sub 13 at low temperatures in high magnetic fields

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Physical Review (Section) B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.40.9358· OSTI ID:5250004

Graf, M J ^[1]; Fortune, N A; Brooks, J S ^[2]; Smith, J L; Fisk, Z ^[3]

---

1. Department of Physics, Boston College, Chestnut Hill, Massachusetts 02167 (USA)
2. Department of Physics, Boston University, Boston, Massachusetts 02215 (USA)
3. Center for Material Science, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)

We have measured the specific heat of pure and thoriated (3.3% thorium) UBe{sub 13} in the temperature interval 0.3--1.8 K in applied magnetic fields up to 20 T, and find striking qualitative differences between the two systems. For pure UBe{sub 13} the electronic coefficient of specific heat {gamma}{sub el}(=C{sub el}(T)/T) is noticeably suppressed by a field of 20 T at 1.8 K; below 1 K, however, this reduction from the low-field, normal-state value tends to zero. For the 3.3% thoriated sample, the high-temperature value of {gamma}{sub el} is relatively insensitive to strong magnetic fields, but at lower temperatures the suppression of {gamma}{sub el} becomes much stronger, reaching nearly 40% at 0.35 K in a field of 20 T. This behavior is similar to that observed in most cerium-based heavy-fermion systems.

• OSTI ID: 5250004
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Journal Name: Physical Review (Section) B: Condensed Matter; (USA) Vol. 40:13; 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
CALORIMETRY
INTERMETALLIC COMPOUNDS
MAGNETIC FIELDS
PHYSICAL PROPERTIES
SPECIFIC HEAT
THERMODYNAMIC PROPERTIES
THORIUM ALLOYS
ULTRALOW TEMPERATURE
URANIUM ALLOYS