Abstract
A large-scale IBAD system with the world largest ion source was employed to fabricate ion beam-assisted deposition (IBAD) MgO films. Finally, we successfully fabricated a 1km-length IBAD-MgO film at a production rate of 1km/h. We also studied pulsed laser deposited (PLD) CeO2 films directly on IBAD-MgO films. An observation at the interface between MgO and CeO2 films by a transmission electron microscope (TEM), showed that a CeO2 film was finely textured on an IBAD-MgO film though a lattice mismatch was large (28.5%). Then we fabricated PLD–GdBa2Cu3O7−x (GdBCO) film on the CeO2/MgO substrate. Critical currents (Ic) and critical current density (Jc) of the films were over 300A and 3MA/cm2 at 77K, self-field.
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