Suppression of flux-creep in (Bi,Pb)-2212 superconductor by holmium doping

Influences of Yb substitution on the intergrain connections and flux pinning properties of Bi-2212 superconductors

“…Therefore, the superconducting critical parameters were effectively optimized. Rare earth (RE) elements doping on the Sr/Ca site of Bi-2212 were also studied [10,[23][24][25][26][27][28][29][30][31]. All the reported RE ions, such as Gd 3+ , Ho 3+ , Yb 3+ and Eu 3+ could work as effective pinning centers in the BSCCO system, thus obviously improved the critical current density.…”

Influences of Ca nonstoichiometry on the superconducting properties of Bi-2212 superconducting bulks

“…The fitting parameters for different samples are given in Table 2. All the samples exhibit similar p and q values of p *0.5 and q *2, which implies the surface pinning is dominant pinning mechanism in these bulks [21]. Therefore, grain boundaries is important for not only the intergrain connections but also the flux pinning properties in these bulks.…”

“…The introduction of Pb can decrease the lattice parameter c of Bi-2212, which not only reduces its anisotropic parameter, but also introduces effective flux pinning centers to enhance the in-field current capacity. Rare earth (RE) elements doping on the Sr/Ca site of Bi-2212 are also studied [18][19][20][21][22]. RE ions, such as Ho 3?…”

Effect of zirconium diffusion on the microstructural and superconducting properties of YBa2Cu3O7−δ superconductors

“…3 shows that the peak intensities of the Zr-diffused sample generally are greater than that of the pure one. The enhancement in the peak intensities may point out the enhanced grain growth and orientation of grains in the presence of the Zr ions, leading to the increase of the critical current density [34,35]. Moreover, it is another interesting point obtained from Fig.…”