Trapped fields larger than 11 T in bulk YBa/sub 2/Cu/sub 3/O/sub 7-x/ material

Author

Fuchs, G. ; Krabbes, G. ; Schatzle, P. ; Gruss, Sascha ; Verges, P. ; Muller, K.-H. ; Fink, J. ; Schultz, L.

Author_Institution

IFW, Dresden, Germany

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

890

Lastpage

893

Abstract

Bulk YBa/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO) material with single-domain grains up to 35 mm in diameter was prepared by a modified melt-texture process. Trapped fields of 1.1 T at 77 K and of 9 T at 43 K were obtained In zinc-doped YBCO material showing a pronounced peak effect in the field dependence of the critical current density. Very high trapped fields up to 11.4 T have been achieved at 17 K in YBCO material with improved mechanical properties. The tensile strength of this material was enhanced by the addition of silver. Additionally, a stainless steel tube was used in order to strengthen the sample against the magnetic tensile stresses. For application of YBCO samples in superconducting magnetic bearings, it is difficult to magnetize the superconductor to the maximum storable field. The authors present results on magnetizing the YBCO samples by applying pulsed magnetic fields.

Keywords

barium compounds; copper compounds; critical current density (superconductivity); high-temperature superconductors; magnetic bearings; magnetic fields; superconducting devices; tensile strength; yttrium compounds; 1.1 T; 11.4 T; 17 K; 35 mm; 43 K; 77 K; 9 T; HTSC; YBa/sub 2/Cu/sub 3/O/sub 7/; bulk YBa/sub 2/Cu/sub 3/O/sub 7-x/ material; critical current density; magnetic tensile stresses; mechanical properties; modified melt-texture process; pulsed magnetic fields; superconducting magnetic bearings; tensile strength; trapped fields; Critical current density; Magnetic levitation; Magnetic materials; Mechanical factors; Silver; Steel; Superconducting magnets; Superconducting materials; Tensile stress; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828374

Filename

828374