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Bright field cross-sectional TEM images of BZO-doped YBCO films. The single ended arrows point to examples of BZO-NRs, and the scale bars indicate 50 nm. (a) Nonvicinal film showing typical -axis alignment. (b) 5° vicinal with NR splay. (c) Highly defective YBCO lattice of 10° vicinal film. The double-sided arrows show examples of planar defects. (d) 20° vicinal showing BZN-NR aligned with planes.
High-resolution TEM image of 20° vicinal YBCO with BZO showing the edge of a BZO-NR aligned with the YBCO planes. The scale bar indicates 5 nm.
Angular dependence of the transport critical current density for 0°–20° vicinal films at 77 K for applied magnetic fields of 1 and 5 T. The inset shows (77 K, 5 T) normalized to the maximum values . For the sake of comparison at and , the curves have been shifted such that the peaks coincide.
Superconducting transition temperatures (onset, determined magnetically) and self-field critical current densities (77 K, along longitudinal direction) for vicinal angles from 0° to 20°.
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