Ba2LaMbO6, a new perovskite substrate material for YBa2Cu3O 7-δ , has been grown epitaxially on (100) MgO by pulsed-laser ablation method. A superconducting YBa2Cu3O 7-δ film in situ grown on an epitaxial Ba2LaNbO6 film gave a TC(0) = 90 K with a transition width ∆T = 0.5 K. The YBa2Cu3O 7-δ films exhibited (00 ) orientation of an orthorhombic YBa2Cu3O 7-δ phase and showed almost perfect metallic behaviour in the normal state with resistance ratio (R300K/R100K) = 2.98. Critical current density of 5 × 10 6 A/cm 2 at 77 K was obtained consistently for the YBa2Cu3O 7-δ films in situ grown on epitaxial Ba2LaNbO6 films.
Pulsed laser deposition (PLD) is a unique method for growing highly stoichiometric, materials in the form of epitaxial thin films. Here we discuss the optimization of deposition parameters for laser ablation of multi-component La 0.7 Ca 0.3 MnO 3- YBa 2 Cu 3 O 7-δ (LCMO-YBCO) heterostructures grown in situ by sequential deposition of LCMO and YBCO on <100> LaAlO 3 (LAO) substrates using a PLD system. We discuss the growth of these multi-layers, from the device applications point of view.
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