Flux pinning behavior and positron annihilation study on (Pb,Sn)-doped Bi-2212 superconductors Conference Paper uri icon

abstract

  • The flux pinning of (Pb,Sn)-doping on Bi1.6-xSnxPb0.4Sr2CaCu2Oy, and Bi2-2xPbxSnxSr2CaCu2Oyhave been studied by using magnetic measurements, positron annihilation techniques (PAT), scanning electron microscopy and X-ray diffraction. Analysis shows that most of (Pb.Sn) dopants enter the Bi-2212 lattice and occupy Bi sites, which gives rise to electron concentration increasing on Bi-O layers. The (Pb.Sn)-doping improve the conductive property of Bi-layers. Magnetization hysteresis loops exhibit strong pinning behavior in the higher temperature range, close to 50 K, which (Pb.Sn)-doping in the Bi-O layers provide effective pinning centers. 2004 Materials Research Society.

published proceedings

  • FRONTIERS IN SUPERCONDUCTING MATERIALS-NEW MATERIALS AND APPLICATIONS

author list (cited authors)

  • Li, Y., Yin, Z. G., Wang, Y., Cao, G. H., Ross, J. H., Caplin, A. D., ... Wei, L

publication date

  • January 1, 2004 11:11 AM