Improved laser-ablated thin films of NdCeCuO by use of N2O
- 30 November 1992
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 61 (22) , 2715-2717
- https://doi.org/10.1063/1.108070
Abstract
Thin films of the electron‐doped superconductor Nd1.85Ce0.15CuO4−δ were prepared by laser ablation in O2 and N2O ambients. Although films prepared in an O2 ambient need to be reduced to become superconducting, the use of a lower oxygen pressure during deposition produces inferior films. A more metallic character can be obtained by increasing the O2 pressure during deposition. The substitution of N2O for O2 results in films that are superconducting without a separate reduction step, with a sharp transition at about 16 K. A short vacuum anneal at the deposition temperature yields reproducible films with Tc=20 K, without change in the transition width.Keywords
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