Multi-seeding melt growth process of bulk Y-Ba-Cu-O superconductors for engineering applications

A. Wongsatanawarid, H. Seki, Masato Murakami

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We have prepared polycrystalline and four-domain Y-Ba-Cu-O superconductors in a molar ratio of Y123: Y211 = 10: 4 with lwt% Ce02 addition by melt-processing in air. Trapped field measurements showed that four sharp peaks were observed in a four-domain bulk sample, showing that four grains were successfully formed without defects by a multi-seeding method. Force measurements showed that a four-domain Y-Ba-Cu-O sample exhibited higher repulsive forces and smaller hysteresis loops than polycrystalline Y-Ba-Cu-O sample during the increasing and decreasing field processes, which implies higher pinning performance of the four-domain sample. With the aim of studying the transferable torque forces, we used a multi-pole magnet circuit with NSNS configuration. We confirmed that with the interaction of the magnet circuit, a four-domain Y-Ba-Cu-O sample showed larger forces than a polycrystalline sample both in the field-cooled and the zero-field-cooled mode. We also measured the torque forces acting between the magnet circuit and bulk Y-Ba-Cu-O samples by twisting the magnet circuit in the levitated state. Again a four-domain Y-Ba-Cu-O sample exhibited much higher torque forces than a polycrystalline sample. These results showed that multi-seeded Y-Ba-Cu-O sample with four-domains can be used for torque transfer apllications.

Original languageEnglish
Article number012047
JournalJournal of Physics: Conference Series
Volume234
Issue numberPART 1
DOIs
Publication statusPublished - 2010

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YBCO superconductors
inoculation
engineering
torque
magnets
twisting
poles
hysteresis

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Multi-seeding melt growth process of bulk Y-Ba-Cu-O superconductors for engineering applications. / Wongsatanawarid, A.; Seki, H.; Murakami, Masato.

In: Journal of Physics: Conference Series, Vol. 234, No. PART 1, 012047, 2010.

Research output: Contribution to journalArticle

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