Compressibility of the high-Tc superconductor La1.7Ba0.3CuO4−y
R. Moret, Alan I. Goldman, A. Moodenbaugh
DOI 10.1103/PhysRevB.37.7867 · Physical Review B
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Abstract
We report on x-ray diffraction measurements of the pressure dependence of the cell parameters of La1.7Ba0.3CuO4−y at room temperature up to 45 kbar. The compressibility κ≊5.6×10−4 kbar−1, and is nearly isotropic above 7 kbar. However, the contraction of the basal plane a lattice parameter appears to be negligible at lower pressure, indicating a possible structural change near 7 kbar which may be associated with a previously reported anomaly in the pressure dependence on Tc.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La1.7Ba0.3CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25 | Pressure unresolved | onset |
| La1.85Ba0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37.6 | Pressure unresolved | unknown |
| La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 42.4 | 1.9 GPa | unknown |
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