Angular dependence of the magnetic-field-induced resistive transition in single-crystal Bi/sub 2. 2/Sr/sub 2/Ca/sub 0. 8/ Cu/sub 2/O/sub 8+//sub delta/
We report here detailed measurements of the angular and temperature dependence of the magnetic-field-induced resistive transition in single-crystal Bi/sub 2.2/Sr/sub 2/Ca/sub 0.8/Cu/sub 2/O/sub 8+//sub delta/. Resistance is observed in the sample for small values of applied field (approx. =100 Oe) even at low current densities (<10 A/cm/sup 2/). This suggests that the resistive transition does not reflect the upper-critical field of the superconductor in a simple manner, but is complicated by flux-flow effects. Consequently, the angular dependence of the resistive transition can not be fit by any standard model for anisotropic critical fields in superconductors. We find anisotropic ratios as large as 50 for fields applied parallel and perpendicular to the c-circumflex axis of the crystal, indicating large differences in the viscosity for flux motion in the two directions.
- Research Organization:
- Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
- OSTI ID:
- 6781666
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Vol. 38:10
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH OXIDES
CRITICAL FIELD
MAGNETORESISTANCE
CALCIUM OXIDES
COPPER OXIDES
STRONTIUM OXIDES
MAGNETIC FLUX
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
MAGNETIC FIELDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity