Measurement of the specific-heat anomaly at the superconducting transition of YBa2Cu3O7−δ
S. E. Inderhees, M. B. Salamon, T. A. Friedmann, D. M. Ginsberg
DOI 10.1103/PhysRevB.36.2401 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
The specific heat of the ceramic superconductor YBa2Cu3O7−δ has been measured in the vicinity of the transition temperature Tc=90 K, using a combination of ac and heat-pulse calorimetry. A step change ΔCp=6.2 mJ/gK is observed at Tc 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 ⊖D≈440 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90.1 | Pressure not reported | zero_resistance |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91.6 | Pressure not reported | midpoint |
Similar papers
Specific heat of single crystals of YBa2Cu3O7−δ: Fluctuation effects in a bulk superconductor
similarity 0.96S. E. Inderhees et al.
Source status unknown — claims are unverified
Thermoelectric power and superconducting properties of Y1Ba2Cu3O7−δ and R1Ba2Cu3O7−δ
similarity 0.96S. C. Lee et al.
Source status unknown — claims are unverified
Search for Isotope Effect in Superconducting Y-Ba-Cu-O
similarity 0.96L. C. Bourne et al.
Source status unknown — claims are unverified
ac susceptibility near the superconducting transition in polycrystalline YBa2Cu3O7−δ
similarity 0.95W. M. Tiernan & R. B. Hallock
Source status unknown — claims are unverified
Structural and superconducting properties of R1−xCaxBa2Cu3O7−δ with 0.50>~x>~0.00
similarity 0.95A. Sedky et al.
Source status unknown — claims are unverified
Macroscopic quantum phenomena in high-Tc superconducting material
similarity 0.95A. Th. A. M. de Waele et al.
Source status unknown — claims are unverified