Influence of Fe impurities on the Y-Ba-Cu-O superconducting system
M. Mehbod, P. Wyder, R. Deltour, Ph. Duvigneaud, G. Naessens
DOI 10.1103/PhysRevB.36.8819 · Physical Review B
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Abstract
We have studied the influence of Fe impurities in high-temperature superconductors of the type Y1.2Ba0.8CuO4−δ and YBa2Cu3O7−δ on the critical temperature as measured by the resistance transition. The chemical compositions of the different phases have been determined using a scanning electron microscope and electron-probe microanalysis. We find that for low concentrations Fe substitutes for Cu in the superconducting phase. The transition temperature decreases linearly as a function of the Fe concentration, in remarkable analogy with the situation in conventional superconductors with paramagnetic impurities.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Y1.2Ba0.8CuO4-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | midpoint |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89 | Pressure not reported | midpoint |
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