Measurement of the specific heat anomaly at the superconducting transition of YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/

Journal Article · Sat Aug 01 04:00:00 EDT 1987 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.36.2401· OSTI ID:5923353

Inderhees, S E; Salamon, M B; Friedmann, T A; Ginsberg, D M

The specific heat of the ceramic superconductor YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ has been measured in the vicinity of the transition temperature T/sub c/ = 90 K, using a combination of ac and heat-pulse calorimetry. A step change ..delta..C/sub p/ = 6.2 mJ/g K is observed at T/sub c/ which, when divided by the electronic contribution to the heat capacity estimated from susceptibility data, gives a value close to that expected from Bardeen-Cooper-Schrieffer (BCS) theory. These results confirm that the material is a bulk superconductor with BCS-like behavior. The lattice contribution can be fitted to a Debye specific heat with FTHETA/sub D/approx. =440 K.

• Research Organization: Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801
• OSTI ID: 5923353
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:4; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BCS THEORY
CALORIMETRY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PULSE TECHNIQUES
SPECIFIC HEAT
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES