Constraints on the temperature dependence of the magnetic penetration depth of superconducting Bi sub 2 Sr sub 2 CaCu sub 2 O sub 8+ x from measurements of the low-temperature specific heat
- Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801 (United States)
We have measured the low-temperature (2--10 K) specific heat of polycrystalline Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{ital x}} in zero applied field and in an applied magnetic field of 1 T. We find no field-induced enhancement of the specific heat, to within the 1% resolution of our calorimeter, in a field of 1 T up to 10 K, in contrast to the YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} system. The results suggest that the enhancements which have been observed in the specific heat result from a temperature dependence of the pinning of vortices in the mixed state. In analyzing our data, we use a model for the enhancement of the specific heat, and find quantitative agreement. Using this model, we place constraints on the allowed temperature dependence of the {ital ab}-plane magnetic penetration depth.
- OSTI ID:
- 5000819
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Vol. 45:6; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BISMUTH OXIDES
PENETRATION DEPTH
CALCIUM OXIDES
COPPER OXIDES
STRONTIUM OXIDES
HIGH-TC SUPERCONDUCTORS
MIXED STATE
POLYCRYSTALS
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
TEMPERATURE RANGE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)