Upper critical magnetic fields of pure and thoriated UBe/sub 13/

Journal Article · Mon Aug 01 04:00:00 EDT 1988 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.38.2934· OSTI ID:6979612

Schmiedeshoff, G M; Ma, Y P; Brooks, J S; Maple, M B; Fisk, Z; Smith, J L

We present measurements of the upper critical magnetic field H/sub c//sub 2/(T) determined from the dc magnetization of polycrystalline samples of U/sub (1-//sub x//sub )/Th/sub x/Be/sub 13/ with x = 0 and x = 0.0331 and a single crystal of pure UBe/sub 13/. We find changes in slope in the H/sub c//sub 2/ vs T phase diagrams of both polycrystalline samples which suggests entrance into a second superconducting phase at about T/sub c//2. A degradation of the superconducting critical field is observed in the single crystal which may be related to the absence of second-phase behavior in this sample. Our results are discussed in light of recent experimental and theoretical treatments of second-phase behavior in heavy-fermion superconductors.

• Research Organization: Department of Physics, Bowdoin College, Brunswick, Maine 04011
• OSTI ID: 6979612
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:4; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTINIDE ALLOYS
ALLOYS
BERYLLIUM ALLOYS
CRITICAL FIELD
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
INFORMATION
INTERMETALLIC COMPOUNDS
MAGNETIC FIELDS
MAGNETIZATION
NUMERICAL DATA
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THORIUM ALLOYS
URANIUM ALLOYS