Abstract

We have in-situ grown superconducting ultrathin YBaCuO films by an off-axis rf sputtering technique using a single high-T c YBa 2Cu 3O 7−y oxide compound. The substrates was MgO(100). The thickness of the films varies from 20 to 200 nm. The X-ray diffraction pattern shows clear diffraction peaks. The scanning electron micrograph shows a smooth surface morphology. Superconductivities of ultrathin films will be reported.

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