Upper critical field of (Bi,Pb) sub 2 Sr sub 2 CaCu sub 2 O sub 8 single crystals

Journal Article · Sun Mar 01 04:00:00 EST 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.45.4978· OSTI ID:5070779

Zhang, L; Liu, J Z; Shelton, R N ^[1]

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1. Department of Physics, University of California at Davis, Davis, California 95616 (United States)

Reversible temperature-dependent magnetization measurements are conducted in fields up to 5 T on two (Bi,Pb){sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} single crystals for fields along the {ital c} axis. A linear temperature dependence of the reversible magnetization has been obtained over a wide temperature range. The value of the magnetization slope {ital dM}/{ital dT} in the linear region at a fixed field decreases at higher field. Both the wide range of rounding of the magnetization near {ital T}{sub {ital c}} and the field-dependent {ital dM}/{ital dT} in the (Bi,Pb){sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} system indicate that the traditional extrapolation method based on a linear Abrikosov formula near {ital H}{sub {ital c}2} may not be applied. A theoretical model is employed to determine the Ginzburg-Landau parameter {kappa} and upper critical field {ital H}{sub {ital c}2} versus temperature. For these two crystals, we find {kappa}=94 and 89, and {ital H}{sub {ital c}2}(0)=95 and 83 T, respectively, for fields parallel to the {ital c} axis.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5070779
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 45:9; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ABRIKOSOV THEORY
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRITICAL FIELD
CRYSTALS
GINZBURG-LANDAU THEORY
HIGH-TC SUPERCONDUCTORS
LEAD COMPOUNDS
LEAD OXIDES
MAGNETIC FIELDS
MAGNETIZATION
MINERALS
MIXED STATE
MONOCRYSTALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITE
PEROVSKITES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TRANSITION ELEMENT COMPOUNDS