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

We investigated the growth mode of YBa/sub 2/Cu/sub 3/O/sub 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 s...

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Veröffentlicht in:IEEE transactions on magnetics 1999-09, Vol.35 (5), p.4070-4072
Hauptverfasser: Chan-Joong Kim, Gye-Won Hong, Jee, Y.A., Young-Hee Han, Sang-Chul Han, Tae-Hyun Sung
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container_end_page 4072
container_issue 5
container_start_page 4070
container_title IEEE transactions on magnetics
container_volume 35
creator Chan-Joong Kim
Gye-Won Hong
Jee, Y.A.
Young-Hee Han
Sang-Chul Han
Tae-Hyun Sung
description We investigated the growth mode of YBa/sub 2/Cu/sub 3/O/sub 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.
doi_str_mv 10.1109/20.800758
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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.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/20.800758</doi><tpages>3</tpages></addata></record>
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subjects BARIUM OXIDES
BOUNDARIES
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conducting materials
COPPER OXIDE
COPPER OXIDES
Crystalline materials
Exact sciences and technology
FABRICATION
GRAIN BOUNDARIES
GRAIN GROWTH
Grain size
Grains
Laboratories
LEVITATION
MAGNETIC FIELD
MAGNETIC FIELDS
Magnetic properties
MATERIALS SCIENCE
Melts
Physics
Powders
Properties of type I and type II superconductors
Seeds
Subsidiaries
Superconductivity
SUPERCONDUCTORS
Temperature
Trapped magnetic fields
YBCO superconductors
Yttrium barium copper oxide
YTTRIUM OXIDE
YTTRIUM OXIDES
title Fabrication of a good-quality single grain YBCO sample through the control of seed crystals
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