Thermal properties of the high-Tc superconductors La1.85Sr0.15CuO4 and YBa2Cu3O7
S. J. Collocott, G. K. White, S. X. Dou, R. K. Williams
DOI 10.1103/PhysRevB.36.5684 · Physical Review B
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Abstract
The heat capacity Cp of samples La1.85Sr0.15CuO4 and YBa2Cu3O7 has been measured from 1.5 to 40 K, and the linear thermal expansivity α of La1.85Sr0.15CuO4 measured in the range 2 to 80 K. The heat capacities show similar temperature dependencies and magnitudes (per gram) with a linear (tunneling?) term dominating below 4 K. α also shows a comparable T term below 4 K and both Cp and α show a small discontinuity of ≈ 1% near Tc≈34 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 34 | Pressure not reported | unknown |
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29.5 | Pressure not reported | zero_resistance |
| La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 36 | Pressure not reported | onset |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | zero_resistance |
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