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Although the production of YBa$_{2}$Cu$_{3}$O$_{7-\delta}$ (Y123) has beenextensively reported, there is still a lack of information on the ideal heattreatment to produce this material in the form of one dimension nanostructures.Thus, by means of the Solution Blow Spinning technique, metals embedded inpolymer fibers were prepared. These polymer composite fibers were fired andthen investigated by thermogravimetric analysis. The maximum sinteringtemperatures of heat treatment were chosen in the interval\SI{850}{\celsius}-\SI{925}{\celsius} for one hour under oxygen flux. SEMimages allowed us to determine the wire diameter as approximately 350~nm forall samples, as well as to map the evolution of the entangled wire morphologywith the sintering temperature. XRD analysis indicated the presence of Y123 andsecondary phases in all samples. Ac magnetic susceptibility and dcmagnetization measurements demonstrated that the sample sintered at\SI{925}{\celsius}/1h is the one with the highest weak-link criticaltemperature and the largest diamagnetic response.

Optimum heat treatment to enhance the weak-linkresponse of Y123 nanowires prepared by SolutionBlow Spinning