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http://dx.doi.org/10.9714/psac.2019.21.4.019

Fabrication of a high magnetization YBCO bulk superconductor by a bottom-seeded melt growth method  

Hong, Yi-Seul (Korea Polytechnic University)
Park, Soon-dong (Korea Atomic Energy Research Institute)
Kim, Chan-Joong (Korea Atomic Energy Research Institute)
Lee, Hee-Gyoun (Korea Polytechnic University)
Publication Information
Progress in Superconductivity and Cryogenics / v.21, no.4, 2019 , pp. 19-23 More about this Journal
Abstract
A large grain YBCO bulk superconductor is fabricated by the top-seeded melt growth (TSMG) method. In the TSMG process, the seed crystal is placed on the top surface of a partially melted compact and therefore the seed crystal is frequently tilted during the melt process due to intrinsic unstable nature of Y211 particle +liquid phase mixture. In this work, we report the successful growth of single-domain YBCO bulk superconductors by a bottom-seeded melt growth (BSMG) method. Investigations on the trapped magnetic field and the microstructures of the synthesized specimens show that a bottom-seeded melt growth method has hardly affected on the crystal growth behavior, the microstructure development and the magnetic properties of the large grain YBCO bulk superconductors. The bottom-seeded melt growth method is clearly beneficial for the stable control of seed orientation through the melt process for the fabrication of a large grain YBCO bulk superconductor.
Keywords
REBCO; bulk superconductors; bottom seeding; trapped field;
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