Pinning behavior and magnetic relaxation in melt-processed YBCO doped with Li, Ni and Pd

Influence of Sm and Yb Pollution on Superconducting Properties of YBCO Bulk Superconductors

“…1b). These observations are usually typical for chemically doped samples, where impurity atoms substitute atoms in the crystal lattice of superconductor, suppress superconductivity locally and can act as additional pinning centers [9]. Therefore, we analyzed the concentration of possible elements, which could pollute the sample during melt processing, by WDS line microanalyses.…”

Microstructure and thermal properties of quasi-equal rare earth substitution Y0.5Gd0.5Ba2Cu3O6.94 superconductor

“…In addition, several reports have shown that pinning forces can be enhanced through chemical doping with Pr, Nd, Sm, Eu, Gd, Er etc. in Y-123 superconductors [6][7][8]. The presence of a magnetic ion gives also rise to the appearance of a magnetic sub-lattice, though its contribution to HTS magnetic properties remains uncertain [9].…”

Li and Ce doping of melt-textured YBCO: Improved jc at medium fields

“…These limiting factors have focused the attention [2][3][4][5][6][7][8] to the chemical doping of copper sites of the Y123 matrix. By substituting for the copper another atom of suitable covalent radius (Co, Ni, Mn, Li, etc.…”

“…Early lithium doping of the copper site was used to study the magnetic behaviour of the system [10] and to increase the neutron absorption rate of the material [11]. Krabbes and coworkers [5][6][7] have proposed to dope the YBCO with Pt and a small amount of Li 2 CO 3 and the optimal content of lithium atoms were determined to be 0.6 at% with respect to the copper atoms. Strong increase in the j c was reported with a pronounced peak effect in medium fields.…”