Comparative critical field study of superconducting ternary borides

Journal Article · Wed Jul 01 00:00:00 EDT 1987 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00682626· OSTI ID:6089736

Lee, W H; Appl, S; Shelton, R N

The upper critical field (H/sub c2/) and electrical transport properties have been determined for ternary rare-earth transition-metal borides with a variety of crystal structures; namely, ScRu/sub 4/B/sub 4/ (I4/sub 1//acd), ThRh/sub 4/B/sub 4/ (P4/sub 2//nmc), LuOs/sub 3/B/sub 2/ (P6/mmm), LuRuB/sub 2/(Pnma), and YRuB/sub 2/ (Pnma). For the majority of the compounds the critical field measurements are analyzed in terms of the dirty limit (l/sub tr//zeta/sub BCS/(0) << 1) theory of Werthamer, Helfand, and Hohenberg (WHH). For the superconductor YRuB/sub 2/, which is in the clean limit, critical field data are analyzed in terms of the Ginzburg-Landau theory. From the experimental data for (dH/sub c2//dT)/sub T = T/sub c//, T/sub c/, and residual resistivity rho/sub res/, they also have determined the heat capacity coefficient ..gamma.. and BCS coherence length zeta/sub BCS/(0). The kappa values indicate that these compounds are all strong type II superconductors.

• Research Organization: Dept. of Energy, Ames, IA
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6089736
• Journal Information: J. Low Temp. Phys.; (United States), Vol. 68:1-2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LUTETIUM BORIDES
CRITICAL FIELD
OSMIUM BORIDES
RHODIUM BORIDES
RUTHENIUM BORIDES
SCANDIUM BORIDES
THORIUM BORIDES
TYPE-II SUPERCONDUCTORS
YTTRIUM BORIDES
BCS THEORY
BOUNDARY CONDITIONS
COHERENCE LENGTH
COMPARATIVE EVALUATIONS
GINZBURG-LANDAU THEORY
HEXAGONAL LATTICES
MAGNETIC FIELDS
ORTHORHOMBIC LATTICES
SUPERCONDUCTIVITY
TERNARY ALLOY SYSTEMS
TETRAGONAL LATTICES
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
X-RAY DIFFRACTION
ACTINIDE COMPOUNDS
ALLOY SYSTEMS
BORIDES
BORON COMPOUNDS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
DIMENSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LENGTH
LUTETIUM COMPOUNDS
OSMIUM COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
RHODIUM COMPOUNDS
RUTHENIUM COMPOUNDS
SCANDIUM COMPOUNDS
SCATTERING
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
THORIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
&amp; Refractories- Physical Properties
360202 - Ceramics
Cermets
&amp; Refractories- Structure &amp; Phase Studies