Surface columnar defects on melt textured Y-Ba-Cu-O

Author

Gozzelino, L. ; Chiodoni, A. ; Gerbaldo, R. ; Ghigo, G. ; Minetti, B. ; Mezzetti, E. ; Krabbes, G. ; Rovelli, A.

Author_Institution

Politecnico di Torino, Italy

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

3525

Lastpage

3528

Abstract

In this paper we report on the effect of columnar defects created only in a surface sheet of high quality melt textured YBCO by means of 2 GeV gold ions. The ion tracks implant in a few percent fraction of the full sample thickness. Maps of the trapped field at 77 K in a large size pellet, before and after irradiation, are shown. A full magnetic characterization of small size samples in the high temperature regime is also presented. The data point coherently to the conclusion that in this region some correlated disorder, artificially created only in a small fraction of the sample, can extend its benefits to the whole sample

Keywords

barium compounds; critical current density (superconductivity); crystal defects; flux pinning; high-temperature superconductors; ion beam effects; magnetic susceptibility; melt texturing; surface structure; yttrium compounds; 77 K; YBa₂Cu₃O₇; YBa₂Cu₃O₇:Au; correlated disorder; gold ions; high quality melt textured YBCO; ion tracks; irradiation; large size pellet; magnetic characterization; melt textured Y-Ba-Cu-O; small size samples; surface columnar defects; surface sheet; trapped field; Creep; Critical current density; Gold; Implants; Magnetic flux; Scanning electron microscopy; Superconducting magnets; Surface texture; Temperature distribution; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919824

Filename

919824