Comment on “Structural and superconducting properties of R1−xCaxBa2Cu3O7−δ with 0.50>~x>~0.00”
J. L. Tallon, G. V. M. Williams
DOI 10.1103/PhysRevB.61.9820 · Physical Review B
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Abstract
The interpretation of x-ray diffraction, resistivity, and susceptibility measurements on R1−xCaxBa2Cu3O7−δ by Sedky et al. [Phys. Rev. B 58, 12 495 (1998)] in terms of different site preferences for oxygen vacancies and the compensation of Ca by the loss of oxygen is shown to be inconsistent with the wider body of experimental research.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NdBa2Cu3O6.92 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88 | Pressure not reported | unknown |
| NdBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 96 | Pressure not reported | unknown |
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