Enhanced critical current density in melt textured YBCO via Au ion surface irradiation

Author

Mezzetti, E. ; Gerbaldo, R. ; Ghigo, G. ; Gozzelino, L. ; Minetti, B. ; Cherubini, R.

Author_Institution

Dept. of Phys., Politecnico di Torino, Italy

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

1993

Lastpage

1996

Abstract

We irradiated both side of bulk melt textured YBCO with 235 MeV Au ions. The thickness of the specimens is significantly larger than the penetration range of the ions so that two surface layers of columnar defects are created. Critical current density enhancements were obtained in temperature and field ranges that are useful for applications. The boundary between reversible and irreversible regime is shifted toward higher temperatures. At higher fields the increase of the relaxation rate with temperature is less steep after irradiation. The general trends are independent of the thickness of the samples, at least in the range from 5% to 13% of volume affected by irradiation.

Keywords

barium compounds; critical current density (superconductivity); high-temperature superconductors; ion beam effects; yttrium compounds; 235 MeV; Au; Au ion surface irradiation; HTSC; YBaCuO; applications; columnar defects; enhanced critical current density; irreversible regime; melt textured YBaCuO; relaxation rate; reversible regime; surface layers; Critical current density; Crystalline materials; Gold; Laboratories; Pins; Shape; Superconducting materials; 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

10.1109/77.620980

Filename

620980