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  • 1
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on the epitaxial growth and structural properties of Pb(ZrxTi1−x)O3 (PZT) thin films and of epitaxial heterostructures containing metallic DyBa2Cu3O7 (DyBCO) and ferroelectric PZT layers grown using an off-axis rf reactive sputtering technique. On (100) and (110) SrTiO3 substrates, tetragonal (001) and (011) epitaxial Pb(Zr0.52Ti0.48)O3 films have been obtained. Extensive characterization on (001) PZT films using x-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM), Rutherford backscattering spectroscopy, and atomic force microscopy reveal a very high degree of structural quality, and very smooth surfaces with a root-mean-square roughness of 3 A(ring) for a 0.5 μm×0.5 μm scan on a 1000 A(ring) thick film. TEM studies on DyBCO–PZT structures reveal sharp and clean interfaces without traces of intermixing. Primary dislocations are observed at the DyBCO–PZT interface, which do not propagate through the PZT layer. [101]-type dislocations are also seen, possibly related to subgrains in the PZT layer, and they show an extended strain field throughout the PZT layer. The possible relation between these structural defects and the nonlinear current–voltage characteristics observed in DyBCO–PZT–Au structures is discussed. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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