DocumentCode :
1547920
Title :
Modification of bulk properties of Bi/sub 1.8/Pb/sub 0.33/Sr/sub 1.87/Ca/sub 2/Cu/sub 3/O/sub y/ tapes by means of ion induced surface trenches
Author :
Mezzetti, E. ; Crescio, E. ; Gerbaldo, R. ; Ghigo, G. ; Gozzelino, L. ; Minetti, B. ; Gherardi, L. ; Martini, L. ; Cuttone, G. ; Rovelli, A.
Volume :
9
Issue :
2
fYear :
1999
fDate :
6/1/1999 12:00:00 AM
Firstpage :
1872
Lastpage :
1875
Abstract :
This paper demonstrates the possibility to enhance predictably the behavior of the superconducting properties in a bulk material, by introducing linearly correlated defects within a surface layer. Columnar defects, having a depth of about 5% of the total thickness of the sample, were created on Ag/BSCCO-2223 tapes by means of 0.25 GeV Au ions at different fluences, with a dose equivalent field B/sub /spl phi// ranging from 1 T to 5 T. The implantation depth was about 15% of the total thickness of the sample. The shape and position of the irreversibility lines were deeply modified. The vortex dynamics, as investigated by a.c. susceptometry in d.c. magnetic field, exhibits features characteristics of Bose-glass like localization in a range of field between the onset of the localized phase and the dose equivalent field. From all the experimental data it emerges that the strategy of creating surface trenches for vortices is always largely effective in this range of magnetic fields.
Keywords :
bismuth compounds; calcium compounds; critical current density (superconductivity); flux-line lattice; high-temperature superconductors; ion implantation; ion-surface impact; lead compounds; silver; strontium compounds; superconducting tapes; Ag/BSCCO-2223 tapes; Bi/sub 1.8/Pb/sub 0.33/Sr/sub 1.87/Ca/sub 2/Cu/sub 3/O/sub 10/-Ag; Bi/sub 1.8/Pb/sub 0.33/Sr/sub 1.87/Ca/sub 2/Cu/sub 3/O/sub y/ tapes; Bose-glass like localization; bulk properties; columnar defects; dose equivalent field; high temperature superconductor; implantation depth; ion induced surface trenches; irreversibility lines; localized phase; vortices; Bismuth; Gold; Laboratories; Magnetic susceptibility; Shape; Silver; Strontium; Superconducting epitaxial layers; Superconducting films; Superconducting materials;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/77.784823
Filename :
784823
Link To Document :
بازگشت