High temperature superconductors for low frequency magnetic shielding

Author

Wang, J. ; Sayer, M.

Author_Institution

Queen´s Univ., Kingston, Ont., Canada

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

185

Lastpage

188

Abstract

The authors report the results of magnetic shielding measurements on pure YBa/sub 2/Cu/sub 3/O/sub 7- delta /, silver-doped YBa/sub 2/Cu/sub 3/O/sub 7- delta / packed powder, laser ablated thin film, and copper. The shielding factors of bulk ceramics were much higher than those of other materials and were not a function of frequency in the range from 10 Hz to 3000 Hz. Simply packed superconducting powder did not show any shielding. While polycrystalline ceramics were effective as shields, the thickness of the ceramic played a crucial role in shielding. The breakthrough field increased with thickness. The influence of DC fields on the shielding behavior depended on the magnitude of the fields.<>

Keywords

barium compounds; high-temperature superconductors; magnetic shielding; superconducting thin films; yttrium compounds; 10 to 3000 Hz; HTSC; YBa/sub 2/Cu/sub 3/O/sub 7- delta /; YBa/sub 2/Cu/sub 3/O/sub 7- delta /:Ag; breakthrough field; bulk ceramics; influence of DC fields; laser ablated thin film; low frequency magnetic shielding; polycrystalline ceramics; Ceramics; Copper; Frequency; High temperature superconductors; Magnetic films; Magnetic shielding; Powders; Superconducting magnets; Superconducting materials; Superconducting thin films;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233701

Filename

233701