The influence of columnar defects on the critical current density in (Bi, Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta}} Ag tapes
- Universitaet Erlangen-Nuernberg (Germany)
- Universitaet Erlangen-Nuernberg (Germany); and others
An excellent tool to enhance the critical current density in superconductors is the controlled introduction of defects by irradiation damage. Irradiation with 2.65 GeV Au ions provides the generation of amorphous line defects. Polycrystalline (Bi, Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta}}Ag tapes processed by the powder-in-tube technique were irradiated up to doses of 3.5 x 10{sup 11} Au ions/cm{sup 2} at a temperature of 100 K. On the one hand, these irradiation experiments were performed to investigate the degree of j{sub c} enhancement and, on the other hand, to examine the flux pinning mechanism in (Bi, Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta}} tapes. Characterization of the samples was performed by magnetization measurements using a vibrating sample magnetometer (VSM) up to 13 T in a temperature range between 5 and 100 K. Further, the authors have measured the relaxation of the magnetic moment before and after irradiation to determine the influence of columnar defects on the activation energy U. A comparison of the irradiation-induced effects with previous results obtained on Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} irradiation experiments is included.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 106852
- Journal Information:
- Journal of Superconductivity, Vol. 7, Issue 5; Other Information: PBD: Oct 1994
- Country of Publication:
- United States
- Language:
- English
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