Magnetic field dependence of the thermoelectric power of superconducting Bi-Sr-Ca-Cu-O

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

DOI:https://doi.org/10.1103/PhysRevB.40.8814· OSTI ID:5178087

Gridin, V V; Pernambuco-Wise, P; Trendall, C G; Datars, W R; Garrett, J D ^[1]

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1. Department of Physics, McMaster University, Hamilton, Ontario, Canada L8S4M1 (CA)

Measurements of the temperature and magnetic field dependence of the thermopower {ital S}({ital B},{ital T}) are presented for a polycrystalline sample of the {ital T}{similar to}85 K phase of Bi-Sr-Ca-Cu-O. Between 90 and 140 K, {ital S}({ital B},{ital T}) is positive and shows a small decrease with increasing temperature. In this temperature interval the application of an external magnetic field does not influence {ital S}({ital B},{ital T}). Below 90 K, {ital S}(0,{ital T}) drops sharply at the superconducting transition temperature. The magnetic field {ital B} causes a suppression of the transition temperature similar to the effect observed in resistivity data. The field data are interpreted in terms of the Abrikosov vortex lattice for the mixed state of the type-II superconductor. Relating the thermopower to the transport entropy of the vortex motion due to the temperature gradient across the sample, we find that the sign of the charge carriers is positive, and the principal unit {h bar}/2{ital m} of the particle flux is within 13% of its tabulated value.

• OSTI ID: 5178087
• Journal Information: Physical Review (Section) B: Condensed Matter; (USA), Vol. 40:13; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
THERMOELECTRIC PROPERTIES
CALCIUM OXIDES
COPPER OXIDES
STRONTIUM OXIDES
LOW TEMPERATURE
MAGNETIC FIELDS
MIXED STATE
PEROVSKITE
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMOMAGNETISM
TRANSITION TEMPERATURE
TYPE-II SUPERCONDUCTORS
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
MAGNETISM
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity