Journal
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
Volume 35, Issue 9, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1361-6668/ac811e
Keywords
REBCO; single-direction melt growth; melt grown bulk; trapped field; superconducting joint
Categories
Funding
- JSPS KAKENHI, Japan [19K05006]
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By using a single-direction melt growth method, we have successfully fabricated textured bulks of various shapes and sizes with high reproducibility and excellent superconducting properties.
We have developed a single-direction melt growth method in which REBCO melt-textured bulks grow only vertically from a seed plate utilizing the difference in peritectic temperatures of REBCO. Entirely c-grown YBCO, DyBCO and GdBCO bulks with various sizes and shapes were successfully fabricated with high reproducibility. Disk-shaped bulks showed high trapped fields with almost concentric field distributions, reflecting homogeneous and boundaryless bulk structures. In particular, a YBCO bulk with a 32 mm diameter trapped a high field more than 1 T at 77 K. Furthermore, rectangular and joined hexagonal REBCO bulks were successfully fabricated, showing designed field-trapping distributions reflecting their shapes through well-connected superconducting joints among bulks.
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