In-field dependences of the critical current density J$_c$ in GdBa$_2$Cu$_3$O$_{7-d}$ coated conductors produced by Zr irradiation and post-annealing at low temperatures

We report the influence of 6 MeV Zr $^{4 +}$ irradiation and post-irradiation annealing (200 {\deg}C) in the in-field dependences of the critical current densities J $_{c}$ of 1.3 $μ$ m thick GdBa $_{2}$ Cu $_{3}$ O $_{7 - d}$ coated conductors grown by co-evaporation. Samples were irradiated with 6 MeV Zr $^{4 +}$ and fluences between 2.3x10 $^{11}$ cm $^{- 2}$ and 3x10 $^{12}$ cm $^{- 2}$ . The correlation between the superconducting critical temperature T $_{c}$ and in-field dependences of critical current densities J $_{c}$ has been analyzed. In addition, random disorder introduced by irradiation was reduced by thermal annealed at 200 {\deg}C. The analysis of our experimental findings indicates that the optimal irradiation (reducing random disorder by annealing) results in the suppression of the self-field J $_{c}$ of $≃$ 10 $%$ and in-field J $_{c}$ enhancements nearly doubled at about 5 T. A clear correlation between T $_{c}$ , disorder and self-field J $_{c}$ is observed. Additional random disorder and nanoclusters suppress systematically T $_{c}$ and increase the flux creep relaxation at intermediate temperatures (reducing the characteristic glassy $μ$ value).

In-field dependences of the critical current density J $_{c}$ in GdBa $_{2}$ Cu $_{3}$ O $_{7 - d}$ coated conductors produced by Zr irradiation and post-annealing at low temperatures

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In-field dependences of the critical current density J $_{c}$ in GdBa $_{2}$ Cu $_{3}$ O $_{7 - d}$ coated conductors produced by Zr irradiation and post-annealing at low temperatures

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In-field dependences of the critical current density Jcc​ in GdBa22​Cu33​O7−d7−d​ coated conductors produced by Zr irradiation and post-annealing at low temperatures

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In-field dependences of the critical current density Jcc​ in GdBa22​Cu33​O7−d7−d​ coated conductors produced by Zr irradiation and post-annealing at low temperatures

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In-field dependences of the critical current density J $_{c}$ in GdBa $_{2}$ Cu $_{3}$ O $_{7 - d}$ coated conductors produced by Zr irradiation and post-annealing at low temperatures

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In-field dependences of the critical current density J $_{c}$ in GdBa $_{2}$ Cu $_{3}$ O $_{7 - d}$ coated conductors produced by Zr irradiation and post-annealing at low temperatures

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