NANOSTRUCTURED SUPERCONDUCTING MATERIAL OF TYPE REBa2Cu3O7 (RE = RARE EARTH OR YTTRIUM) WITH A HIGH DENSITY OF VORTEX ANCHORING CENTRES AND PREPARATION METHOD THEREOF

Nanostructured superconducting material of the type REBa2Cu3O7, where RE=Rare Earth or Yttrium characterised by a structure comprising:

• two phases:
• a main matrix of REBa2Cu3O7,
• a secondary phase of BaZrO3, CeO2, BaSnO3, BaCeO3, SrRuO3, La1-xMxMnO3 (M=Ca, Sr, Ba), RE2O3 and/or RE2Cu2O5) distributed at random throughout the matrix, which profoundly modifies the nanostructure of the superconductor,
• and with a density of nanometric defects in its structure in the range of 103-104 defects/μm3, so that the separation between the defects is only a few tens of nm,
• and a reduction in the anisotropy of the critical current, below the value of thin films of REBa2Cu3O7 prepared without secondary phases, caused by the defects generated.