Artificial Pinning Center Studies in BI2212 Tapes and Bulks With Zirconium Oxide Inclusion

Author

Cursino, Eliana ; Schmool, D.S. ; Garitaonandia, J.S. ; Rodrigues, Durval, Jr.

Author_Institution

Dept. de Eng. de Mater., Univ. de Sao Paulo (USP), Lorena, Brazil

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

3516

Lastpage

3519

Abstract

Zirconium oxide inclusion in Bi2212 superconducting tapes and bulks was studied as possible artificial pinning centers (APC). In order to analyze the zirconium oxide APC addition in Bi2212 samples, magnetization measurements were performed in bulks and transport properties measurements were performed on tapes. In magnetization measurements, the critical current densities are proportional to the width of the magnetization loop at each applied magnetic field. Addition of ZrO₂ in Bi2212 superconductors broadened the magnetization loop and enhanced the critical current densities at 4.2 K in bulks, as a clear indication that ZrO₂ addition improved the pinning and acted as APCs. In contrast, the transport critical current densities decreased in tapes.

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); doping profiles; flux pinning; high-temperature superconductors; inclusions; magnetisation; scanning electron microscopy; strontium compounds; superconducting tapes; zirconium compounds; Bi2212 superconducting tapes; Bi₂Sr₂CaCu₂O₈:ZrO₂; SEM; artificial pinning centers; critical current density; doping concentration; flux pinning; magnetization loop width measurements; temperature 4.2 K; transport property; zirconium oxide inclusion; APC; Bi2212; doping; zirconium oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2018117

Filename

5067207