Figure 6
Magnetic field dependence of the critical current density at (a) 5 K and (b) 77 K normalized to its self-field value for pn-nanocomposite films with 20 mol% BZO (10 nm) (red triangle) and 20 mol% BHO (10 nm) (blue triangle) compared with a pristine YBCO (black circle). The horizontal dashed line in Fig. 5(a) marks the criterion to determine the μ0H* value \(({{\rm{J}}}_{{\rm{c}}}({\mu }_{0}{\rm{H}}\ast )=0,9{{\rm{J}}}_{{\rm{c}}}^{{\rm{s}}{\rm{e}}{\rm{l}}{\rm{f}}})\).
