Y-Ba-Cu-O/Dy-Ba-Cu-O superlattices: A first step towards the artificial construction of high-Tc superconductors
J.-M. Triscone, M. G. Karkut, L. Antognazza, O. Brunner, Ø. Fischer
DOI 10.1103/PhysRevLett.63.1016 · Physical Review Letters
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Abstract
We have for the first time epitaxially grown superlattices of Y-Ba-Cu-O/Dy-Ba-Cu-O by dc magnetron sputtering onto SrTiO3 and MgO substrates. The wavelengths range from 24 (twice the c axis) to 300 Å and x-ray diffractograms show satellite peaks characteristic of multilayers for each wavelength. The 24-Å-wavelength sample consists of, on the average, alternate planes of Y and Dy. The multilayers are superconducting with Tc0’s between 85 and 89 K, transition widths of 2 K, and resistivity ratios of about 3.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | zero_resistance |
| DyBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | zero_resistance |
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