Electromagnetic behaviour of bulk textured YBaCuO

Author

Winter, V. ; Hermann, P.F. ; Agnoux, C. ; Leriche, A. ; Mautref, M. ; Grivon, F. ; Fevier, A. ; de Rango, P.

Author_Institution

Alcatel Alsthom Recherche, Marcoussis, France

Volume

28

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

892

Lastpage

895

Abstract

Electrical and magnetic results obtained on bulk YBaCuO samples manufactured by the melt textured growth process are reported. These studies are important for understanding the limitation mechanisms of transport current. Transport critical current densities in excess of 2.5×10⁸ A/m² have been measured in a field of 2 T at 77 K in oriented YBaCuO. The critical state concept for the calculation of internal flux profiles is used to model the magnetization behavior of textured materials. Magnetization measurements are compared with theoretical curves for different orientations of the magnetic field with respect to crystallographic axes. This study makes it possible to determine inductive critical current densities which are strongly influenced by the current path geometry. The results are compared to transport J_ct values. Self-field loss values are also presented

Keywords

barium compounds; critical current density (superconductivity); high-temperature superconductors; losses; magnetisation; texture; yttrium compounds; bulk textured YBaCuO; critical current densities; critical state concept; current path geometry; high temperature superconductor; internal flux profiles; magnetization behavior; melt textured growth; self field loss; transport current limitation mechanisms; Critical current density; Crystalline materials; Current measurement; Density measurement; Magnetic field measurement; Magnetic flux; Magnetic materials; Magnetization; Manufacturing processes; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.120022

Filename

120022