Title :
Persistent current density and flux creep in Bi-Sr-Ca-Cu-O/Ag tapes with splayed columnar defects from 0.8 GeV proton irradiation
Author :
Thompson, J.R. ; Krusin-Elbaum, L. ; Kim, Y.C. ; Christen, D.K. ; Marwick, A.D. ; Wheeler, R. ; Li, C. ; Patel, S. ; Shaw, D.T. ; Lisowski, P. ; Ullmann, J.
Author_Institution :
Oak Ridge Nat. Lab., TN, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
Composite Bi/sub 2/Sr/sub 2/Ca/sub 1/Cu/sub 2/O/sub 8//Ag tapes were irradiated with 0.8 GeV protons to create splayed columnar defects in the superconductor. The resultant effective pinning of vortices leads to an enhanced persistent current density in the CuO planes, displacement of the irreversibility line to higher temperatures and magnetic fields, and a major reduction in the logarithmic time decay rate of the supercurrent density.<>
Keywords :
bismuth compounds; calcium compounds; composite superconductors; critical current density (superconductivity); crystal defects; flux creep; flux pinning; high-temperature superconductors; proton effects; silver; strontium compounds; superconducting tapes; 0.8 GeV; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/-Ag; BiSrCaCuO/Ag tapes; CuO planes; composite Bi/sub 2/Sr/sub 2/Ca/sub 1/Cu/sub 2/O/sub 8//Ag tapes; enhanced persistent current density; flux creep; high temperature superconductors; irreversibility line displacement; logarithmic time decay rate; proton irradiation; splayed columnar defects; supercurrent density; vortices pinning; Creep; Crystals; Laboratories; Persistent currents; Physics; Protons; Superconducting films; Superconducting materials; Superconductivity; Temperature;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
