Fabrication of a good-quality single grain YBCO sample through the control of seed crystals

Author

Kim, Chan-Joong ; Hong, Gye-Won ; Jee, Young A. ; Han, Young-Hee ; Han, Sang-Chul ; Sung, Tae-Hyun

Author_Institution

Supercond. Res. Lab., Korea Atomic Energy Res. Inst., Taejon, South Korea

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

4070

Lastpage

4072

Abstract

We investigated the growth mode of YBa₂Cu₃O _7-y (Y123) grains and its effect on the levitation forces and trapped magnetic field of top-seeded melt processed YBCO samples. When a slab-like Sm-seed was used, undesirable subsidiary Y123 grains were formed, while the formation of the subsidiary Y123 grains was suppressed and a nearly single Y123 grain grew when a thick and wide seed was used. The formation of the subsidiary Y123 grains decreased the levitation forces and trapped magnetic field, due to the presence of grain boundaries with weak link characteristics

Keywords

barium compounds; crystal growth from melt; grain boundaries; high-temperature superconductors; magnetic fields; magnetic levitation; yttrium compounds; HTSC; YBa₂Cu₃O_7-y; YBa₂Cu₃O₇; fabrication; good-quality single grain YBaCuO sample; grain boundaries; growth mode; levitation forces; seed crystals control; slab-like Sm-seed; subsidiary Y123 grains; top-seeded melt processed YBCO samples; trapped magnetic field; weak link characteristics; Conducting materials; Crystalline materials; Fabrication; Grain size; Laboratories; Levitation; Magnetic fields; Powders; Temperature; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800758

Filename

800758